#include<bits/stdc++.h> using namespace std; int main() { int x,n; cin>>x; if(x>=3&&x<=6) { n=355; cout<<1; } else if(x>=7&&x<=10) { n=3515; cout<<2; } else if(x>=10) { n=3525; cout<<4; } return 0; }

using namespace std;

int main()

{

int x,n;

cin>>x;

if(x>=3&&x<=6)

{

n=3*5*5;

cout<<1;
}

else if(x>=7&&x<=10)

{

n=3*5*15;

cout<<2;

}

else if(x>=10)

{

n=3*5*25;

cout<<4;

}

}