Submission #791313

Source Code Expand

#include <iostream>
#include <vector>


int main() {
	int N, M;
	std::cin >> N >> M;

	std::vector<std::vector<bool>> badcase(N, std::vector<bool>(N));
	for (int i = 0; i < M; i++) {
		int x, y;
		std::cin >> x >> y;
		badcase[--y][--x] = true;
	}

	std::vector<long long> dp(1 << N);
	dp[0] = 1;

	for (int i = 0; i < (1 << N); i++) {
		for (int j = 0; j < N; j++) {
			if ((1 << j) & i) continue;

			bool isbad = false;
			for (int k = 0; k < N; k++) {
				if (((1 << k) & i) && badcase[k][j]) {
					isbad = true;
					break;
				}
			}

			if (!isbad) dp[i + (1 << j)] += dp[i];
		}
	}

	std::cout << dp[(1 << N) - 1] << std::endl;

	return 0;
}

Submission Info

Submission Time
Task D - 徒競走
User alated
Language C++14 (GCC 5.4.1)
Score 100
Code Size 687 Byte
Status AC
Exec Time 49 ms
Memory 768 KiB

Judge Result

Set Name Sample Subtask1 All
Score / Max Score 0 / 0 30 / 30 70 / 70
Status
AC × 3
AC × 15
AC × 32
Set Name Test Cases
Sample 0_00.txt, 0_01.txt, 0_02.txt
Subtask1 0_00.txt, 0_01.txt, 1_00.txt, 1_01.txt, 1_02.txt, 1_03.txt, 1_04.txt, 1_05.txt, 1_06.txt, 1_07.txt, 1_08.txt, 1_09.txt, 1_10.txt, 1_11.txt, 1_12.txt
All 0_00.txt, 0_01.txt, 0_02.txt, 1_00.txt, 1_01.txt, 1_02.txt, 1_03.txt, 1_04.txt, 1_05.txt, 1_06.txt, 1_07.txt, 1_08.txt, 1_09.txt, 1_10.txt, 1_11.txt, 1_12.txt, 2_00.txt, 2_01.txt, 2_02.txt, 2_03.txt, 2_04.txt, 2_05.txt, 2_06.txt, 2_07.txt, 2_08.txt, 2_09.txt, 2_10.txt, 2_11.txt, 2_12.txt, 2_13.txt, 2_14.txt, 2_15.txt
Case Name Status Exec Time Memory
0_00.txt AC 4 ms 256 KiB
0_01.txt AC 4 ms 256 KiB
0_02.txt AC 49 ms 768 KiB
1_00.txt AC 4 ms 256 KiB
1_01.txt AC 4 ms 256 KiB
1_02.txt AC 4 ms 256 KiB
1_03.txt AC 4 ms 256 KiB
1_04.txt AC 4 ms 256 KiB
1_05.txt AC 4 ms 256 KiB
1_06.txt AC 4 ms 256 KiB
1_07.txt AC 4 ms 256 KiB
1_08.txt AC 4 ms 256 KiB
1_09.txt AC 4 ms 256 KiB
1_10.txt AC 4 ms 256 KiB
1_11.txt AC 4 ms 256 KiB
1_12.txt AC 4 ms 256 KiB
2_00.txt AC 49 ms 768 KiB
2_01.txt AC 43 ms 768 KiB
2_02.txt AC 41 ms 768 KiB
2_03.txt AC 42 ms 768 KiB
2_04.txt AC 19 ms 512 KiB
2_05.txt AC 14 ms 512 KiB
2_06.txt AC 20 ms 512 KiB
2_07.txt AC 14 ms 512 KiB
2_08.txt AC 40 ms 768 KiB
2_09.txt AC 33 ms 768 KiB
2_10.txt AC 32 ms 768 KiB
2_11.txt AC 19 ms 768 KiB
2_12.txt AC 48 ms 768 KiB
2_13.txt AC 43 ms 768 KiB
2_14.txt AC 45 ms 768 KiB
2_15.txt AC 47 ms 768 KiB