#include <algorithm>
#include <array>
#include <cmath>
#include <cstdio>
#include <deque>
#include <iomanip>
#include <iostream>
#include <numeric>
#include <optional>
#include <queue>
#include <sstream>
#include <unordered_map>
#include <unordered_set>
#include <vector>

using namespace std;

int main() {
    int32_t n, m;
    cin >> n >> m;
    if (n == 1 || n == 2) {
        cout << n - 1 << endl;
        return 0;
    }
    int32_t x = 0, y = 1;
    for (auto i = 3; i <= n; ++i) {
        auto t = (x + y) % m;
        x = y;
        y = t;
    }
    cout << y << endl;
    return 0;
}