#include #include #include using int64 = long long; int64 pow_mod(int64 a, int64 n, int64 mod) { int64 r = 1; for (; n; n >>= 1) { if (n & 1) r = r * a % mod; a = a * a % mod; } return r; } int64 calc(int64 n, int64 mod) { // (2 + sqrt{3}) ^ (2^n) % mod if (pow_mod(3, mod / 2, mod) == 1) { n = pow_mod(2, n, mod - 1); } else { n = pow_mod(2, n, mod + 1); } int64 a = 1, b = 0; int64 c = 2, d = 1; for (; n; n >>= 1) { if (n & 1) { int64 u = (a * c + 3 * b * d) % mod; int64 v = (a * d + b * c) % mod; a = u, b = v; } int64 u = (c * c + d * d * 3) % mod; int64 v = 2 * c * d % mod; c = u, d = v; } return a; } int main() { int64 n, m; scanf("%lld%lld", &n, &m); int64 r = calc(n, m) * 2 % m + m - 2; printf("%lld\n", r % m); return 0; }