102 条题解

  • 15
    @ 2023-5-13 16:33:18

    任何一个伟大的梦想，都有一个微不足道的开始。

    但这个微不足道的开始可就不要抄题解了哟~

    #include<iostream>
using namespace std;
int a,b;
int main(){
	scanf("%d%d",&a,&b);
	printf("%d",a+b);
	return 0;
}
  • 2
    @ 2023-11-19 16:21:19 
    #include<iostream>
using namespace std;
int a,b;
int main(){
	scanf("%d%d",&a,&b);
	printf("%d",a+b);
	return 0;
}
    • 1
      @ 2023-10-21 16:20:43

      终于可以写一份A+B这么难的题的题解了。

      咦？竟然没有人写LCT的题解？

      Link-Cut Tree 会很伤心的！

      ORZ为了不让LCT伤心于是我来一份LCT的A+B题解吧！

      送上代码：`

      #include <cstring>
#include <cstdio>
#include <cstring>
using namespace std;
struct node
{
int data,rev,sum;
node *son[2],*pre;
bool judge();
bool isroot();
void pushdown();
void update();
void setson(node *child,int lr);
}lct[233];
int top,a,b;
node *getnew(int x)
{
node *now=lct+ ++top;
now->data=x;
now->pre=now->son[1]=now->son[0]=lct;
now->sum=0;
now->rev=0;
return now;
}
bool node::judge(){return pre->son[1]==this;}
bool node::isroot()
{
if(pre==lct)return true;
return !(pre->son[1]==this||pre->son[0]==this);
}
void node::pushdown()
{
if(this==lct||!rev)return;
swap(son[0],son[1]);
son[0]->rev^=1;
son[1]->rev^=1;
rev=0;
}
void node::update(){sum=son[1]->sum+son[0]->sum+data;}
void node::setson(node *child,int lr)
{
this->pushdown();
child->pre=this;
son[lr]=child;
this->update();
}
void rotate(node *now)
{
node *father=now->pre,*grandfa=father->pre;
if(!father->isroot()) grandfa->pushdown();
father->pushdown();now->pushdown();
int lr=now->judge();
father->setson(now->son[lr^1],lr);
if(father->isroot()) now->pre=grandfa;
else grandfa->setson(now,father->judge());
now->setson(father,lr^1);
father->update();now->update();
if(grandfa!=lct) grandfa->update();
}
void splay(node *now)
{
if(now->isroot())return;
for(;!now->isroot();rotate(now))
if(!now->pre->isroot())
now->judge()==now->pre->judge()?rotate(now->pre):rotate(now);
}
node *access(node *now)
{
node *last=lct;
for(;now!=lct;last=now,now=now->pre)
{
splay(now);
now->setson(last,1);
}
return last;
}
void changeroot(node *now)
{
access(now)->rev^=1;
splay(now);
}
void connect(node *x,node *y)
{
changeroot(x);
x->pre=y;
access(x);
}
void cut(node *x,node *y)
{
changeroot(x);
access(y);
splay(x);
x->pushdown();
x->son[1]=y->pre=lct;
x->update();
}
int query(node *x,node *y)
{
changeroot(x);
node *now=access(y);
return now->sum;
}
int main()
{
scanf("%d%d",&a,&b);
node *A=getnew(a);
node *B=getnew(b);
//连边 Link
connect(A,B);
//断边 Cut
cut(A,B);
//再连边orz Link again
connect(A,B);
printf("%d\n",query(A,B));
return 0;
}
      • 0
        @ 2023-11-19 16:21:28 
        #include<iostream>
using namespace std;
int a,b;
int main(){
	scanf("%d%d",&a,&b);
	printf("%d",a+b);
	return 0;
}
        • 0
          @ 2023-7-9 16:49:49 
          #include<bits/stdc++.h>
using namespace std;
int main(){
    int a;
    int b;
    cin>>a>>b;
    cout<<a+b;
     return 0;
}
          • -1
            @ 2023-3-20 20:35:52

            贴下高精度

            #include<bits/stdc++.h>
using namespace std;
int myCompare(string a,string b)
{
	if(a.size()!=b.size())
	{
		if(a.size()>b.size())
			return 1;
		else 
			return -1;
	}
	else
	{
		if(a>b)
			return 1;
		else if(a==b)
			return 0;
		else 
			return -1;
	}
}
string myAdd(string a,string b)	
{
	int n=max(a.size(),b.size())+1;    
	vector<int>ans(n,0);
	int i=a.size()-1,j=b.size()-1,k=n-1;
	while(i>=0&&j>=0)
	{
		ans[k--]=(a[i--]-'0')+(b[j--]-'0');
	}
	while(j>=0)
	{
		ans[k--]=(b[j--]-'0');
	}
	while(i>=0)
	{
		ans[k--]=(a[i--]-'0');
	}
	string c="";
	for(int i=n-1;i>0;i--)
	{
		if(ans[i]>=10)
		{
			ans[i]-=10;
			ans[i-1]++;
		}
		c.insert(0,1,ans[i]+'0');
	} 
	
	if(ans[0]>0)
	{
		c.insert(0,1,ans[0]+'0');
	}
	return c;
}
int main(){
	string a,b;
	cin>>a>>b;
	cout<<myAdd(a,b);
	return 0;
}
            • -1
              @ 2023-3-11 11:01:29
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              [ ] 54 道题

              • 1
              状态 题目显示标签 AC / 尝试 难度[](javascript:;)
              --------------------------------------------------------
              100 Accepted P7【入门】鸡兔同笼问题* 需要找规律的循环 43 / 100 4
              100 Accepted P8【入门】买小猫小狗* 需要找规律的循环 27 / 51 3
              100 Accepted P15【入门】百钱百鸡问题* 需要找规律的循环 40 / 147 6
              100 Accepted P17【入门】购买文具* 需要找规律的循环 16 / 25 4
              100 Accepted P18【入门】兑换硬币* 需要找规律的循环 20 / 59 6
              100 Accepted P75【基础】小青蛙回来了* 需要找规律的循环 15 / 26 5
              100 Accepted P76【基础】寻找2的幂* 需要找规律的循环 12 / 17 6
              100 Accepted P77【入门】桐桐的计算* 需要找规律的循环 8 / 20 7
              100 Accepted P78【入门】桐桐去购物* 需要找规律的循环 6 / 21 8
              100 Accepted P79【入门】求恰好使s=1+1/2+1/3+…+1/n的值大于X时n的值。* 需要找规律的循环 9 / 10 9
              100 Accepted P80【基础】三角形的个数* 需要找规律的循环 8 / 16 8
              100 Accepted P82【入门】时间转换* 需要找规律的循环 9 / 19 7
              100 Accepted P83【入门】猴子吃桃子* 需要找规律的循环 32 / 90 5
              100 Accepted P84【基础】回文数* 需要找规律的循环 9 / 16 7
              100 Accepted P85【入门】因子求和* 需要找规律的循环 5 / 18 8
              100 Accepted P86【入门】寻找雷劈数* 需要找规律的循环 6 / 12 9
              100 Accepted P87【入门】姐妹数对* 需要找规律的循环 6 / 8
              100 Accepted P88【入门】两个自然数M和N的最小公倍数。* 需要找规律的循环 11 / 15 6
              100 Accepted P89【入门】求两个自然数M和N的最大公约数* 需要找规律的循环 14 / 16
              100 Accepted P90【入门】找数游戏* 需要找规律的循环 4 / 11 9
              100 Accepted P91【入门】同因查找* 需要找规律的循环 7 / 8
              0 Format Error P92【入门】奇数及偶数和* 需要找规律的循环 0 / 8 10
              100 Accepted P93【入门】aabb* 需要找规律的循环 14 / 22 5
              100 Accepted P121【基础】“倒”数* 需要找规律的循环 47 / 240 7
              100 Accepted P220【入门】买糕点* 需要找规律的循环 2 / 2 10
              100 Accepted P227【入门】阿凡提的难题* 需要找规律的循环 3 / 6
              100 Accepted P241【入门】角谷猜想* 需要找规律的循环 5 / 24 8
              100 Accepted P248【入门】求数列的第n项的值是多少？* 需要找规律的循环 2 / 2 10
              100 Accepted P249【入门】搬砖问题* 需要找规律的循环 3 / 11 9
              100 Accepted P250【入门】马克思手稿的问题* 需要找规律的循环 3 / 7 10
              P261【入门】该存多少钱* 需要找规律的循环 0 / 3
              P310【基础】第n盆花是什么颜色？* 需要找规律的循环 14 / 112 8
              P315【入门】队形数量求解* 需要找规律的循环 2 / 4 10
              P329【入门】需要举办多少场足球赛？* 需要找规律的循环 4 / 6
              P339【入门】怎样种树？* 需要找规律的循环 1 / 1
              P346【入门】植树的人数* 需要找规律的循环 5 / 10 9
              P347【入门】纸盒的最大体积是多少？* 需要找规律的循环 2 / 4 10
              P348【入门】买公园门票* 需要找规律的循环 1 / 1
              P349【入门】费马定理* 需要找规律的循环 2 / 3
              P352【入门】门票的定价* 需要找规律的循环 1 / 1
              100 Accepted P353【入门】小兔子的最大活动面积* 需要找规律的循环 2 / 6
              P391【入门】恐龙园买玩具？* 需要找规律的循环 1 / 1
              P392【入门】小丽找数？* 需要找规律的循环
              P393【入门】开学大采购？* 需要找规律的循环
              P457【入门】小明学游泳* 需要找规律的循环
              P465【基础】小鱼的航程* 需要找规律的循环 2 / 2
              P466【基础】数的统计* 需要找规律的循环 1 / 1
              P788【入门】换钞票* 需要找规律的循环
              P789【入门】采购水果* 需要找规律的循环 2 / 2
              P957【入门】数字之和* 需要找规律的循环 2 / 3
              P1122【入门】换钞票（2）（change）* 需要找规律的循环 0 / 0 (无)
              P1124【入门】换零钱（1）* 需要找规律的循环 1 / 1 10
              P1128【入门】找公约数* 需要找规律的循环 29 / 149 7
              P1129【入门】求约数* 需要找规律的循环 2 / 2 10
              • 1

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              • -1
                @ 2023-3-4 10:40:49 
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[ ] 54 道题



* **1**

| 状态 | 题目**显示标签** | AC / 尝试 | 难度[](javascript:;) |
| - | - | - | - |
| -------------------------------------------------------- |


|  [100 Accepted](http://219.153.61.2:20004/record/636cde756248fb90a93b86c3)   |  [**P7**【入门】鸡兔同笼问题](http://219.153.61.2:20004/p/7)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                   | 43 / 100 | 4    |
| --------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ---------- | ------ |
|  [100 Accepted](http://219.153.61.2:20004/record/636cde8e6248fb90a93b86d1)   |  [**P8**【入门】买小猫小狗](http://219.153.61.2:20004/p/8)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                     | 27 / 51  | 3    |
|  [100 Accepted](http://219.153.61.2:20004/record/636ce3b66248fb90a93b87a9)   |  [**P15**【入门】百钱百鸡问题](http://219.153.61.2:20004/p/15)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                 | 40 / 147 | 6    |
|  [100 Accepted](http://219.153.61.2:20004/record/6370ea546248fb90a93bde04)   |  [**P17**【入门】购买文具](http://219.153.61.2:20004/p/17)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                     | 16 / 25  | 4    |
|  [100 Accepted](http://219.153.61.2:20004/record/6370ebbb6248fb90a93bde39)   |  [**P18**【入门】兑换硬币](http://219.153.61.2:20004/p/18)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                     | 20 / 59  | 6    |
|  [100 Accepted](http://219.153.61.2:20004/record/6374862d6248fb90a93c3006)   |  [**P75**【基础】小青蛙回来了](http://219.153.61.2:20004/p/75)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                 | 15 / 26  | 5    |
|  [100 Accepted](http://219.153.61.2:20004/record/6374873d6248fb90a93c30a6)   |  [**P76**【基础】寻找2的幂](http://219.153.61.2:20004/p/76)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                    | 12 / 17  | 6    |
|  [100 Accepted](http://219.153.61.2:20004/record/637487736248fb90a93c30ca)   |  [**P77**【入门】桐桐的计算](http://219.153.61.2:20004/p/77)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                   | 8 / 20   | 7    |
|  [100 Accepted](http://219.153.61.2:20004/record/637488036248fb90a93c30f2)   |  [**P78**【入门】桐桐去购物](http://219.153.61.2:20004/p/78)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                   | 6 / 21   | 8    |
|  [100 Accepted](http://219.153.61.2:20004/record/637489056248fb90a93c317b)   |  [**P79**【入门】求恰好使s=1+1/2+1/3+…+1/n的值大于X时n的值。](http://219.153.61.2:20004/p/79)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF) | 9 / 10   | 9    |
|  [100 Accepted](http://219.153.61.2:20004/record/63748ce36248fb90a93c31a1)   |  [**P80**【基础】三角形的个数](http://219.153.61.2:20004/p/80)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                 | 8 / 16   | 8    |
|  [100 Accepted](http://219.153.61.2:20004/record/63748d1c6248fb90a93c31bc)   |  [**P82**【入门】时间转换](http://219.153.61.2:20004/p/82)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                     | 9 / 19   | 7    |
|  [100 Accepted](http://219.153.61.2:20004/record/63748d406248fb90a93c31c9)   |  [**P83**【入门】猴子吃桃子](http://219.153.61.2:20004/p/83)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                   | 32 / 90  | 5    |
|  [100 Accepted](http://219.153.61.2:20004/record/63748e116248fb90a93c31d5)   |  [**P84**【基础】回文数](http://219.153.61.2:20004/p/84)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                       | 9 / 16   | 7    |
|  [100 Accepted](http://219.153.61.2:20004/record/63749bdc6248fb90a93c3360)   |  [**P85**【入门】因子求和](http://219.153.61.2:20004/p/85)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                     | 5 / 18   | 8    |
|  [100 Accepted](http://219.153.61.2:20004/record/63749c216248fb90a93c336f)   |  [**P86**【入门】寻找雷劈数](http://219.153.61.2:20004/p/86)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                   | 6 / 12   | 9    |
|  [100 Accepted](http://219.153.61.2:20004/record/63749c3f6248fb90a93c337b)   |  [**P87**【入门】姐妹数对](http://219.153.61.2:20004/p/87)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                     | 6 / 8    | 9    |
|  [100 Accepted](http://219.153.61.2:20004/record/63749cf56248fb90a93c3387)   |  [**P88**【入门】两个自然数M和N的最小公倍数。](http://219.153.61.2:20004/p/88)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                 | 11 / 15  | 6    |
|  [100 Accepted](http://219.153.61.2:20004/record/63749e566248fb90a93c33a8)   |  [**P89**【入门】求两个自然数M和N的最大公约数](http://219.153.61.2:20004/p/89)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                 | 14 / 16  | 6    |
|  [100 Accepted](http://219.153.61.2:20004/record/63749f3d6248fb90a93c33b6)   |  [**P90**【入门】找数游戏](http://219.153.61.2:20004/p/90)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                     | 4 / 11   | 9    |
|  [100 Accepted](http://219.153.61.2:20004/record/63749f946248fb90a93c33c2)   |  [**P91**【入门】同因查找](http://219.153.61.2:20004/p/91)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                     | 7 / 8    | 9    |
|  [0 Format Error](http://219.153.61.2:20004/record/6374a0b36248fb90a93c33d0) |  [**P92**【入门】奇数及偶数和](http://219.153.61.2:20004/p/92)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                 | 0 / 8    | 10   |
|  [100 Accepted](http://219.153.61.2:20004/record/6374a31a6248fb90a93c33eb)   |  [**P93**【入门】aabb](http://219.153.61.2:20004/p/93)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                         | 14 / 22  | 5    |
|  [100 Accepted](http://219.153.61.2:20004/record/637588826248fb90a93c40e2)   |  [**P121**【基础】“倒”数](http://219.153.61.2:20004/p/121)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                   | 47 / 240 | 7    |
|  [100 Accepted](http://219.153.61.2:20004/record/638576e16248fb90a93d791b)   |  [**P220**【入门】买糕点](http://219.153.61.2:20004/p/220)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                     | 2 / 2    | 10   |
|  [100 Accepted](http://219.153.61.2:20004/record/638577136248fb90a93d7927)   |  [**P227**【入门】阿凡提的难题](http://219.153.61.2:20004/p/227)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                               | 3 / 6    | 10   |
|  [100 Accepted](http://219.153.61.2:20004/record/635cdfc26248fb90a939b599)   |  [**P241**【入门】角谷猜想](http://219.153.61.2:20004/p/241)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                   | 5 / 24   | 8    |
|  [100 Accepted](http://219.153.61.2:20004/record/6397c2fd6248fb90a93eb064)   |  [**P248**【入门】求数列的第n项的值是多少？](http://219.153.61.2:20004/p/248)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                  | 2 / 2    | 10   |
|  [100 Accepted](http://219.153.61.2:20004/record/6397c32b6248fb90a93eb070)   |  [**P249**【入门】搬砖问题](http://219.153.61.2:20004/p/249)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                   | 3 / 11   | 9    |
|  [100 Accepted](http://219.153.61.2:20004/record/6397c4cc6248fb90a93eb07d)   |  [**P250**【入门】马克思手稿的问题](http://219.153.61.2:20004/p/250)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                           | 3 / 7    | 10   |
|                                                                           |  [**P261**【入门】该存多少钱](http://219.153.61.2:20004/p/261)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                 | 0 / 3    | 10   |
|                                                                           |  [**P310**【基础】第n盆花是什么颜色？](http://219.153.61.2:20004/p/310)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                        | 14 / 112 | 8    |
|                                                                           |  [**P315**【入门】队形数量求解](http://219.153.61.2:20004/p/315)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                               | 2 / 4    | 10   |
|                                                                           |  [**P329**【入门】需要举办多少场足球赛？](http://219.153.61.2:20004/p/329)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                     | 4 / 6    | 10   |
|                                                                           |  [**P339**【入门】怎样种树？](http://219.153.61.2:20004/p/339)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                 | 1 / 1    | 10   |
|                                                                           |  [**P346**【入门】植树的人数](http://219.153.61.2:20004/p/346)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                 | 5 / 10   | 9    |
|                                                                           |  [**P347**【入门】纸盒的最大体积是多少？](http://219.153.61.2:20004/p/347)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                     | 2 / 4    | 10   |
|                                                                           |  [**P348**【入门】买公园门票](http://219.153.61.2:20004/p/348)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                 | 1 / 1    | 10   |
|                                                                           |  [**P349**【入门】费马定理](http://219.153.61.2:20004/p/349)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                   | 2 / 3    | 10   |
|                                                                           |  [**P352**【入门】门票的定价](http://219.153.61.2:20004/p/352)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                 | 1 / 1    | 10   |
|  [100 Accepted](http://219.153.61.2:20004/record/63771c536248fb90a93c78bb)   |  [**P353**【入门】小兔子的最大活动面积](http://219.153.61.2:20004/p/353)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                       | 2 / 6    | 10   |
|                                                                           |  [**P391**【入门】恐龙园买玩具？](http://219.153.61.2:20004/p/391)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                             | 1 / 1    | 10   |
|                                                                           |  [**P392**【入门】小丽找数？](http://219.153.61.2:20004/p/392)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                 | 1 / 1    | 10   |
|                                                                           |  [**P393**【入门】开学大采购？](http://219.153.61.2:20004/p/393)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                               | 1 / 1    | 10   |
|                                                                           |  [**P457**【入门】小明学游泳](http://219.153.61.2:20004/p/457)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                 | 1 / 1    | 10   |
|                                                                           |  [**P465**【基础】小鱼的航程](http://219.153.61.2:20004/p/465)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                 | 2 / 2    | 10   |
|                                                                           |  [**P466**【基础】数的统计](http://219.153.61.2:20004/p/466)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                   | 1 / 1    | 10   |
|                                                                           |  [**P788**【入门】换钞票](http://219.153.61.2:20004/p/788)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                     | 1 / 1    | 10   |
|                                                                           |  [**P789**【入门】采购水果](http://219.153.61.2:20004/p/789)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                   | 2 / 2    | 10   |
|                                                                           |  [**P957**【入门】数字之和](http://219.153.61.2:20004/p/957)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                   | 2 / 3    | 10   |
|                                                                           |  [**P1122**【入门】换钞票（2）（change）](http://219.153.61.2:20004/p/1122)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                    | 0 / 0    | (无) |
|                                                                           |  [**P1124**【入门】换零钱（1）](http://219.153.61.2:20004/p/1124)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                              | 1 / 1    | 10   |
|                                                                           |  [**P1128**【入门】找公约数](http://219.153.61.2:20004/p/1128)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                 | 29 / 149 | 7    |
|                                                                           |  [**P1129**【入门】求约数](http://219.153.61.2:20004/p/1129)* [需要找规律的循环](http://219.153.61.2:20004/p?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)                                   | 2 / 2    | 10   |

* **1**





[ 进入编辑模式](javascript:;)


# 分类


* [动态规划](http://219.153.61.2:20004/p?q=category%3A%E5%8A%A8%E6%80%81%E8%A7%84%E5%88%92)
* [搜索](http://219.153.61.2:20004/p?q=category%3A%E6%90%9C%E7%B4%A2)
* [分治](http://219.153.61.2:20004/p?q=category%3A%E5%88%86%E6%B2%BB)
* [计算几何](http://219.153.61.2:20004/p?q=category%3A%E8%AE%A1%E7%AE%97%E5%87%A0%E4%BD%95)
* [贪心](http://219.153.61.2:20004/p?q=category%3A%E8%B4%AA%E5%BF%83)
* [树结构](http://219.153.61.2:20004/p?q=category%3A%E6%A0%91%E7%BB%93%E6%9E%84)
* [图结构](http://219.153.61.2:20004/p?q=category%3A%E5%9B%BE%E7%BB%93%E6%9E%84)
* [数论](http://219.153.61.2:20004/p?q=category%3A%E6%95%B0%E8%AE%BA)
* [模拟](http://219.153.61.2:20004/p?q=category%3A%E6%A8%A1%E6%8B%9F)
* [数据结构](http://219.153.61.2:20004/p?q=category%3A%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84)
* [博弈论](http://219.153.61.2:20004/p?q=category%3A%E5%8D%9A%E5%BC%88%E8%AE%BA)
* [字符串](http://219.153.61.2:20004/p?q=category%3A%E5%AD%97%E7%AC%A6%E4%B8%B2)
* [组合数学](http://219.153.61.2:20004/p?q=category%3A%E7%BB%84%E5%90%88%E6%95%B0%E5%AD%A6)
* [线性代数](http://219.153.61.2:20004/p?q=category%3A%E7%BA%BF%E6%80%A7%E4%BB%A3%E6%95%B0)
* [高精度算法](http://219.153.61.2:20004/p?q=category%3A%E9%AB%98%E7%B2%BE%E5%BA%A6%E7%AE%97%E6%B3%95)
* [递推](http://219.153.61.2:20004/p?q=category%3A%E9%80%92%E6%8E%A8)
* [递归](http://219.153.61.2:20004/p?q=category%3A%E9%80%92%E5%BD%92)
* [概率论](http://219.153.61.2:20004/p?q=category%3A%E6%A6%82%E7%8E%87%E8%AE%BA)
* [NPC](http://219.153.61.2:20004/p?q=category%3ANPC)
* [其他](http://219.153.61.2:20004/p?q=category%3A%E5%85%B6%E4%BB%96)


[ 手气不错](http://219.153.61.2:20004/problem/random?q=category%3A%E9%9C%80%E8%A6%81%E6%89%BE%E8%A7%84%E5%BE%8B%E7%9A%84%E5%BE%AA%E7%8E%AF)

根据当前过滤条件随机选择一道题








# 状态

* [评测队列](http://219.153.61.2:20004/record)
* [服务状态](http://219.153.61.2:20004/status)



# 开发

* [开源](https://github.com/hydro-dev/Hydro)
* [API](http://219.153.61.2:20004/api)



# 支持

* [帮助](http://219.153.61.2:20004/wiki/help)
* [QQ 群](http://219.153.61.2:20004/wiki/about#contact)




1. [关于](http://219.153.61.2:20004/wiki/about)
1. [联系我们](http://219.153.61.2:20004/wiki/about#contact)
1. [隐私](http://219.153.61.2:20004/wiki/about#privacy)
1. [服务条款](http://219.153.61.2:20004/wiki/about#tos)
1. [版权申诉](https://hydro.js.org/#%E8%81%94%E7%B3%BB%E6%88%91%E4%BB%AC)
1.  Language
1. [Legacy mode](http://219.153.61.2:20004/legacy?legacy=true)
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                • -1
                  @ 2023-2-28 20:50:42 
                  #include<bits/stdc++.h>
using namespace std;
struct zzh{
	char xm[100];
	int xb;
	int n;
	int y;
	int r;
};
zzh a[1000];
bool hzz(zzh f,zzh g)
{
	if(f.n>g.n)
	{
		return 0;
	}
	if(f.n==g.n)
	{
		if(f.y>g.y)
		{
			return 0;
		}
		if(f.y==g.y)
		{
			if(f.r>g.r)
			{
				return 1;
			}
		}
		return 1;
	}
	return 1;
}
int main()
{
	cout<<"请输入一共有多少人"<<endl; 
	int n;
	cin>>n;
	cout<<"输入每个人的 姓名 出生年份 出生月份 出生日"<<endl;
	for(int i=1;i<=n;i++){
		cout<<"第"<<i<<"个人:";
		cin>>a[i].xm>>a[i].n>>a[i].y>>a[i].r; 
	}
	sort(a+1,a+n+1,hzz);
	cout<<endl;
	for(int i=1;i<=n;i++)
	{
		cout<<"第"<<i<<"大的:"; 
		cout<<a[i].xm<<" "<<a[i].n<<" "<<a[i].y<<" "<<a[i].r<<endl;
	}
	return 0;
}
                  • -1
                    @ 2023-2-25 8:37:13
                    题解 - 【入门】大小写转换 - Hydro body { --font-family: "Microsoft Yahei", "Open Sans", "Seravek", "Segoe UI", "Verdana", "PingFang SC", "Hiragino Sans GB", "Lantinghei SC", "Microsoft Yahei", "WenQuanYi Micro Hei", "sans"; --code-font-family: "Ubuntu Mono", "monaco", "Source Code Pro", "Consolas", "Lucida Console", "monospace"; --font-ligatures: none !important; } #panel { display: flex; flex-direction: column; }
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                    3 条题解

                    • 0
                      6 (tyz) LV 5 
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      6 (tyz)
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                    • 1
                      6 (tyz) LV 5 @ 2023-2-18 2:10:35 
                      #include<bits/stdc++.h>
using namespace std;
int main(){
    char a;
	cin>>a;
	int v;
	v=int(a);
	a=a+32;
	printf("%c",a);
	return 0;
}

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                    • 1
                      汤涵棋 (202420502) LV 4 @ 2022-10-29 8:03:06

                      鸡

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<a class="user-profile-name" href="/user/172">
      6 (tyz)
  </a>
                      </span> @ 2023-2-18 2:05:22

                      盗我号是吧

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<a class="user-profile-name" href="/user/172">
      6 (tyz)
  </a>
                      </span> @ 2023-2-18 2:05:39

                      可能还不够资格哈哈哈哈哈

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                    • 0
                      6 (tyz) LV 5 @ 2023-2-18 2:21:32

                      给个全对的题解

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                      信息

                      ID
                      968
                      时间
                      1000ms
                      内存
                      64MiB
                      难度
                      10
                      标签
                      递交数
                      8
                      已通过
                      3
                      上传者
                      mzh
                    题解 - 【入门】大小写转换 - Hydro body { --font-family: "Microsoft Yahei", "Open Sans", "Seravek", "Segoe UI", "Verdana", "PingFang SC", "Hiragino Sans GB", "Lantinghei SC", "Microsoft Yahei", "WenQuanYi Micro Hei", "sans"; --code-font-family: "Ubuntu Mono", "monaco", "Source Code Pro", "Consolas", "Lucida Console", "monospace"; --font-ligatures: none !important; } #panel { display: flex; flex-direction: column; }
                    2. 首页
                    3. 题库
                    4. 训练
                    5. 比赛
                    6. 作业
                    7. 评测记录
                    8. 排名
                    1. tyz
                      1. 我的资料
                      2. 站内消息
                      4. @ Hydro
                      6. 账户设置
                      7. 偏好设置
                      8. 安全设置
                      10. 我的域
                      11. 我的文件
                      12. 博客
                      14. 登出

                    3 条题解

                    • 0
                      6 (tyz) LV 5 
                      </div>
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<a class="user-profile-name" href="/user/172">
      6 (tyz)
  </a>
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                    • 1
                      6 (tyz) LV 5 @ 2023-2-18 2:10:35 
                      #include<bits/stdc++.h>
using namespace std;
int main(){
    char a;
	cin>>a;
	int v;
	v=int(a);
	a=a+32;
	printf("%c",a);
	return 0;
}

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                    • 1
                      汤涵棋 (202420502) LV 4 @ 2022-10-29 8:03:06

                      鸡

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<a class="user-profile-name" href="/user/172">
      6 (tyz)
  </a>
                      </span> @ 2023-2-18 2:05:22

                      盗我号是吧

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<a class="user-profile-name" href="/user/172">
      6 (tyz)
  </a>
                      </span> @ 2023-2-18 2:05:39

                      可能还不够资格哈哈哈哈哈

                      </div>
          <div class="commentbox-edit-target"></div>
          </div>
      </div>
    </li></ul>
</div>
                    • 0
                      6 (tyz) LV 5 @ 2023-2-18 2:21:32

                      给个全对的题解

                      </div>
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</div>
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                      <ul class="pager pager-bottom"><li>
      <span class="pager__item current">1</span>
    </li></ul>

                </div>
</div>
  </div>

                      信息

                      ID
                      968
                      时间
                      1000ms
                      内存
                      64MiB
                      难度
                      10
                      标签
                      递交数
                      8
                      已通过
                      3
                      上传者
                      mzh
                • -2
                  @ 2023-10-21 9:07:46

                  5

                  • -2
                    @ 2023-10-21 9:07:43

                    4

                    • -2
                      @ 2023-10-21 9:07:32

                      1

                      • -2
                        @ 2023-4-8 11:31:56

                        #include<bits/stdc++.h> using namespace std; char a[200]; int main(){ int len,lenmax=0,t=0,end=0,k=0;//len：a的长；lenmax：最长单词长；t：当前单词长；end：词的结束索引 ；k：词的开始索引 gets(a);//输入字符数组a len = strlen(a);//获取a的长 for(int i=0;i<len;i++){//遍历a数组 if(a[i]!=' ' && a[i]!='.'){//如果不是空格或句号 t++;//那么当前单词长++ } else{//如果是空格或句号 if(t>lenmax){//判断当前单词长 > 最长单词长 lenmax = t;//将当前单词长赋值给最长单词长 k = i-t;//记录下该单词的起始位置 end=i-1; } t=0; } } for(int i=k;i<=end;i++){ cout<<a[i]; } cout<<" "<<lenmax; return 0; }

                        • -2
                          @ 2023-2-18 10:22:37 
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          6 (tyz)
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                      <a class="user-profile-badge v-center badge--lv5" href="/user/172" data-tooltip="LV 5: Top 30%">LV 5</a>
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          6 (tyz)
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          6 (tyz)
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                      <a class="user-profile-badge v-center badge--lv5" href="/user/172" data-tooltip="LV 5: Top 30%">LV 5</a>
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 @ <span class="time relative" data-timestamp="1676686235">2023-2-18 2:10:35</span>
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      <div class="typo" data-emoji-enabled data-raw-url="/p/968/solution/63f0339bfe582d833fbeaa4c/raw">
        <pre><code>#include&lt;bits/stdc++.h&gt;
using namespace std;
int main(){
    char a;
	cin&gt;&gt;a;
	int v;
	v=int(a);
	a=a+32;
	printf(&quot;%c&quot;,a);
	return 0;
}
</code></pre>

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          汤涵棋 (202420502)
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                      <a class="user-profile-badge v-center badge--lv4" href="/user/202" data-tooltip="LV 4: Top 40%">LV 4</a>
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 @ <span class="time relative" data-timestamp="1667030586">2022-10-29 8:03:06</span>
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      <div class="typo" data-emoji-enabled data-raw-url="/p/968/solution/635cde3a6248fb90a939b2e6/raw">
        <p>鸡</p>

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    <a class="user-profile-name" href="/user/172">
          6 (tyz)
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 @ <span class="time relative" data-timestamp="1676685922">2023-2-18 2:05:22</span>
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                <p>盗我号是吧</p>

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    <a class="user-profile-name" href="/user/172">
          6 (tyz)
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 @ <span class="time relative" data-timestamp="1676685939">2023-2-18 2:05:39</span>
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                <p>可能还不够资格哈哈哈哈哈</p>

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          6 (tyz)
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                      <a class="user-profile-badge v-center badge--lv5" href="/user/172" data-tooltip="LV 5: Top 30%">LV 5</a>
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 @ <span class="time relative" data-timestamp="1676686892">2023-2-18 2:21:32</span>
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        <p>给个全对的题解</p>

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                          • @ 2023-3-4 11:09:04

                            你谁呀说我名字

                          • @ 2023-3-11 11:00:16

                            @ 嗯嗯 怎么了

                        • -2
                          @ 2023-2-4 11:28:04 
                          #include<bits/stdc++.h>

using namespace std;

const int N = 510;

int n,  m;
int d[N];
bool g[N][N];
int stop[N];
int q[N];

void bfs(){
	memset(d, 0x3f, sizeof d);  //初始化距离 
	q[0] = 1;
	d[1] = 0;
	int hh = 0, tt = 0;
	
	while(hh <= tt){
		int t = q[hh ++ ];
		for(int i = 1; i <= n; i ++ ){
			//之前我一直在迷惑为什么1~n的换乘次数会等于1~n的乘车次数-1
			//其实道理很简单，即从x~y点的最近距离要么是1，要么是换乘次数最少的距离
			//如果x、y在同一条线路，那最短距离肯定是1
			//如果不在同一条线路，那最短距离就会被换乘的站点之间更新，因为一直在找最小距离
			//所以1~n的换乘次数会等于1~n的乘车次数-1
			if(d[i] > d[t] + 1 &amp;&amp; g[t][i]){  //如果点i和点t之间有通路且通过t可以找到到达i的更小距离 
				d[i] = d[t] + 1;
				q[ ++ tt] = i; 
			}
		}
	}
}

int main()
{
	cin>>m>>n;
	string line;
	getline(cin, line);  //读取m、n后面的空格/换行符
	while(m -- ){
		getline(cin, line);  //读入一行
		stringstream ssin(line);  //定义字符串流ssin，用line初始化ssin（相当于赋值） 
		int cnt = 0, p;
		while(ssin>>p) stop[cnt ++ ] = p;
		//将同一条线路的每个站点和之后的每个站点连一条线 
		for(int i = 0; i < cnt; i ++ ){
			for(int j = i + 1; j < cnt; j ++ ){
				g[stop[i]][stop[j]] = true;
			}
		}
	}
	bfs();
	
	if(d[n] == 0x3f3f3f3f) cout<<"NO"<<endl;
	else cout<<max(d[n] - 1, 0)<<endl;
	
	return 0;
}
                          • -2
                            @ 2023-1-31 12:15:45 
                            #include<bits/stdc++.h>
using namespace std;
long long read(){
	long long ans=0,f=1;
	char ch=getchar();
	while(!isdigit(ch)){
		f*=(ch=='-')?-1:1;
		ch=getchar();
	}
	while(isdigit(ch)){
		ans=(ans<<3)+(ans<<1)+(ch^48);
		ch=getchar();
	}
	return ans*f;
}
const int MAXN=505;
int e[MAXN][MAXN],n,m,a,b;
int main(){
	n=read(),m=read();
	memset(e,0x3f,sizeof(e));
	for(int i=1;i<=m;i++){
		int x=read(),y=read(),l=read();
		e[x][y]=l;e[y][x]=l;
	}
	for(int k=1;k<=n;k++){
		for(int i=1;i<=n;i++){
			for(int j=1;j<=n;j++){
					e[i][j]=min(e[i][j],e[i][k]+e[k][j]);
			}
		}
	}
	a=read(),b=read();
	if(e[a][b]==0x3f3f3f3f)cout<<"No path";
	else
	printf("%d",e[a][b]);
}
                            • -2
                              @ 2023-1-30 13:46:13 
                              #include<bits/stdc++.h>
using namespace std;

int read(){
	int ans=0,f=1;
	char ch=getchar();
	while(!isdigit(ch)) f *= (ch=='-') ? -1 : 1, ch = getchar();
	while(isdigit(ch)) ans = ((ans<<1)+(ans<<3)+(ch^48)),ch = getchar();
	return ans*f;
}

const int MAXX = 1e3;
int N, M, sum, cnt;
int g[MAXX][MAXX], flag[MAXX];
std:: queue <int> q;

void dfs(int x){
	if(x==1) printf("%d",x);
	else printf("-%d",x);
	sum++;
	flag[x] = 1;
	for(int i=1;i<=N;i++){
//		if(!g[x][i]) continue;
//		if(flag[i]) continue;
		if(g[x][i] && (!flag[i])) dfs(i);
	}
}

int main(){
	N = read(), M = read();
	for(int i=1;i<=M;i++){
//		int x = read(), y = read();
		int x,y;
		cin>>x>>y;
		g[x][y] = 1;
	}
	dfs(1);
	while(sum+1<=N){
		dfs(sum);
	};
	printf("\n");
	memset(flag,0,sizeof(flag));
	q.push(1);
	flag[1] = 1;
	while(!q.empty()){
		int F = q.front();
		for(int i=1; i<=N; i++){
			if(g[F][i]==1 && (flag[i]==0)){
				q.push(i);
				flag[i] = 1;
			}
		}
		if(F==1) printf("%d",F);
		else printf("-%d",F);
		q.pop();
		cnt++;
	}
	while(cnt<=N){
		while(!q.empty()){
			int F = q.front();
			for(int i=1; i<=N; i++){
				if(g[F][i]==1 && (flag[i]==0)){
					q.push(i);
					flag[i] = 1;
				}
			}
			if(F==1) printf("%d",F);
			else printf("-%d",F);
			q.pop();
			cnt++;
		}
	}
//	for(int i=1;i<=N;i++){
//		for(int j=1;j<=N;j++){
//			printf("%d ",g[i][j]);
//		}
//		printf("\n");
//	}
	return 0;
}
                              • -2
                                @ 2023-1-17 15:45:30

                                【NOI2022】PV「什么是信息学精神？」_哔哩哔哩_bilibili

                                • -2
                                  @ 2023-1-17 15:35:41

                                  OI梗 - 萌娘百科 万物皆可萌的百科全书 (moegirl.org.cn)

                                    • 【入门】熟悉一下Online Judge的环境

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