MOD = 998244353


def mat_mul(a, b):
    res = [[0] * len(b[0]) for _ in range(len(a))]
    for i in range(len(a)):
        for j in range(len(b[0])):
            for k in range(len(b)):
                res[i][j] = (res[i][j] + a[i][k] * b[k][j]) % MOD
    return res


def mat_pow(m, k):
    res = [[0] * len(m) for _ in range(len(m))]
    for i in range(len(m)):
        res[i][i] = 1
    while k:
        if k & 1:
            res = mat_mul(res, m)
        m = mat_mul(m, m)
        k >>= 1
    return res

import sys
sys.setrecursionlimit(10**5)
input=sys.stdin.readline
import pypyjit
pypyjit.set_param('max_unroll_recursion=-1')

n,m=map(int,input().split())

memo={}
def fib(n):
    if n==1:return 0
    if n==2:return 1
    memo[n]=(fib(n-1)+fib(n-2))%m
    return memo[n]

print(fib(n))