#include <stdio.h>
unsigned long long fib(int term, int val, int prev)
{
    if (term == 0)
    {
        return prev; // fibo ke-x
    }
    return (fib(term - 1, val + prev, val));
}
int main()
{
    int x;
    scanf("%d", &x);
    printf("%llu", 125 * fib(x, 1, 0));
}