#include <stdint.h>
#include <stdio.h>

uint64_t Mod;

typedef struct Tuple_t {
    uint64_t fst;
    uint64_t snd;
} Tuple;

Tuple fib(uint64_t n) {
    if (n == 0) {
        Tuple ret = { 1, 0 };
        return ret;
    }
    Tuple ret = fib(n >> 1);
    uint64_t a = ret.fst;
    uint64_t b = ret.snd;
    ret.fst = (a * a % Mod + b * b % Mod) % Mod;
    ret.snd = (2 * a * b % Mod + b * b % Mod) % Mod;
    if (n & 1) {
        uint64_t t = ret.fst;
        ret.fst = ret.snd;
        ret.snd = (t + ret.snd) % Mod; 
    }
    return ret;
}

int main(void) {
    uint64_t N;
    scanf("%lu%lu", &N, &Mod);
    printf("%lu\n", (fib(N)).fst);
    return 0;
}