#include <iostream>

int foo(int n);

int main()
{
    int n;
    std::cin >> n;
    std::cout << foo(n);

    return 0;
}

int foo(int n)
{
    switch(n)
    {
    case 0:
    case 1:
    case 2:
        return 1;
    }
        return 5 * foo(n-1);
}