# -*- coding: utf-8 -*-



def fab(k, m):
    cache = [0, 1]
    for w in range(k - 1):
        cache.append((cache[0] + cache[1]) % m)
        del cache[0]

    return cache[0]


def solve(input):
    n = int(input.split(" ")[0])
    m = int(input.split(" ")[1])
    return fab(n,m)

if __name__ == "__main__":
    print solve(raw_input())