#include <iostream>
#include <iomanip>
#include <stack>
#include <queue>
#include <vector>
#include <algorithm>
#include <map>
#include <set>
using namespace std;

int main(){
    long long n, m;
    cin >> n >> m;

    long long a = 0;
    long long b = 1;
    long long c;
    for(int i = 0; i < n - 2; i++){
        c = a % m + b % m;
        a = b;
        b = c;
    }
    cout << c % m << endl;
}