#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

int main(){
    int n, m;
    cin >> n >> m;
    ll a, b, c;
    a = 0, b = 1;
    for (int i = 0; i < n - 2; i++){
        c = b;
        b = (a + b) % m;
        a = c;
        
    }
    
    cout << b << endl;
}