#include <iostream>
#include <cstdint>
using namespace std;
int main() {
    uint32_t n, m;
    cin >> n >> m;
    uint32_t prev2 = 0, prev1 = 1;
    uint32_t fib;
    for (uint32_t i = 3; i <= n; i++) {
        fib = prev2 + prev1;
        if (fib > m) fib -= m;
        prev2 = prev1;
        prev1 = fib;
    }
    cout << fib << endl;
}