#include <cmath>
#include <iostream>
using namespace std;
auto fib_mod(size_t n, size_t m) {
    size_t memo[1000] = {0, 1}, i;
    for (i = 2; i <= n; i++) {
        memo[i] = (memo[i - 1] + memo[i - 2])%m;
    }
    return memo[n];
}

int main(){
    size_t n,m;
    cin >> n >> m;
    cout << fib_mod(n-1,m) << '\n';
}