#include <iostream>
#include <fstream>
using namespace std;
long long fact(int n)
{
    int p=1;
    for(int i=1;i<=n;++i)
        p=p*i;
    return p;
}
int main()
{
    ifstream fin("fact.in");
    ofstream fout("fact.out");
    int p;
    fin>>p;
    if(p==0)
        fout<<1;
    else
        fout<<p*5;
}