#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;
#ifdef _WIN32
#include <Windows.h>
#endif

int main()
{
    long long n, m, f1 = 0, f2 = 1, f3;
    cin >> n >> m;
    for (int i = 2; i < n; i++){
        long long t;
        f3 = (f1 + f2)%m;
        f1 = f2;
        f2 = f3;
    }
    cout << f3 << endl;
}