#include <iostream>
#include <cstdlib>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iostream>
#include <iomanip>
#include <deque>

int main()
{
    int n, m;
    std::cin >> n >> m;
    long a = 0, b = 1;
    for(int i = 2; i < n; i++){
        int t = a;
        a = b;
        b = (t + b) % m;
    }
    std::cout << b << std::endl;
    return 0;
}