#include <iostream>

using namespace std;

int m;

unsigned long long fibo(int n) {
    unsigned long long num1=1, num2=1, tmp=1;

    for (int i=1; i<n; i++) {
        tmp = num1+num2;
        num1 = num2%m;
        num2 = tmp%m;
    }

    return tmp;
}

int main() {
    int n;

    cin >> n >> m;
/*
    for (int i=0; i<5000000; i++) {
        memo[i] = -1;
    }
*/
    cout << fibo(n-2) % m << endl;

    return 0;
}