#include<bits/stdc++.h> using namespace std; int main() { int n,i,j,s; cin>>n; int a[2n+1][2n+1]; for(i=0;i<n+1;i++) { s=n; for(j=0;j<n+1;j++) { a[i][j]=s; if(j<i) s--; } for(j=n+1;j<2n+1;j++) { if(j>2n-i) s++; a[i][j]=s; } } for(i=n+1;i<2n+1;i++) { s=n; for(j=0;j<n+1;j++) { a[i][j]=s; if(j<2n-i) s--; } for(j=n+1;j<2n+1;j++) { if(j>i) s++; a[i][j]=s; } } for(i=0;i<2n+1;i++) { for(j=0;j<2*n+1;j++) printf("%2d",a[i][j]); cout<<endl; } }

#include<iostream>
using namespace std;
int main(){
	int n,i,j,s;
	cin>>n;
	int a[2*n+1][2*n+1];
	for(i=0;i<n+1;i++){
		s=n;
		for(j=0;j<n+1;j++){
			a[i][j]=s;
			if(j<i) s--;
		}
		for(j=n+1;j<2*n+1;j++){
			if(j>2*n-i) s++;
			a[i][j]=s;
		}
	}
	for(i=n+1;i<2*n+1;i++){
		s=n;
		for(j=0;j<n+1;j++){
			a[i][j]=s;
			if(j<2*n-i) s--;
		}
		for(j=n+1;j<2*n+1;j++){
			if(j>i) s++;
			a[i][j]=s;
		}
	}
	for(i=0;i<2*n+1;i++){
		for(j=0;j<2*n+1;j++) printf("%2d",a[i][j]);
		cout<<endl;
	}
}