#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("fact.in");
ofstream fout("fact.out");
int P;
long long n;

int main()
{
    fin>>P;
    if(P==0)
    {
        fout<<1<<endl;
        return 0;
    }
     n=5*P;
     fout<<n;


    return 0;
}