// yukicoder: No.526 フィボナッチ数列の第N項をMで割った余りを求める
// 2019.4.14 bal4u

#include <stdio.h>

int MOD;

//// fibonacci数の高速計算
void multiply(int F[2][2], int M[2][2])
{
	int x = ((long long)F[0][0] * M[0][0] + (long long)F[0][1] * M[1][0]) % MOD;
	int y = ((long long)F[0][0] * M[0][1] + (long long)F[0][1] * M[1][1]) % MOD;
	int z = ((long long)F[1][0] * M[0][0] + (long long)F[1][1] * M[1][0]) % MOD;
	int w = ((long long)F[1][0] * M[0][1] + (long long)F[1][1] * M[1][1]) % MOD;
	F[0][0] = x, F[0][1] = y, F[1][0] = z, F[1][1] = w;
}

void power(int F[2][2], int n)
{
	int M[2][2] = { {1,1},{1,0} };
	if (n == 0 || n == 1) return;
	power(F, n >> 1);
	multiply(F, F);
	if (n & 1) multiply(F, M);
}

int fib(int n)
{
	int F[2][2] = { {1,1},{1,0} };
	if (n == 0)	return 0;
	power(F, n - 1);
	return F[0][0];
}


int main()
{
	int N;
	scanf("%d%d", &N, &MOD);
	printf("%d\n", fib(N-1));
	return 0;
}