답안 #237966

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
237966	2020-06-09T14:14:47 Z	sahil_k	Tents (JOI18_tents)	C++14	100 / 100	117 ms	70780 KB

tents

#include <iostream>
#define MOD 1000000007
using namespace std;
long long dp[3001][3001];
int main () {
	int n, m;
	cin >> n >> m;
	for (int i=0; i<=n; i++) {
		for (int j=0; j<=m; j++) {
			if (i == 0 || j == 0) {
				dp[i][j] = 1;
				continue;
			}
			dp[i][j] = dp[i-1][j];
			dp[i][j] = (dp[i][j]+4ll*dp[i-1][j-1]*j)%MOD;
			dp[i][j] = (dp[i][j]+1ll*dp[i-1][max(0, j-2)]*j*(j-1)/2)%MOD;
			dp[i][j] = (dp[i][j]+1ll*dp[max(0, i-2)][j-1]*j*(i-1))%MOD;
		}
	}
	cout << dp[n][m]-1 << endl;
}

Subtask #1

48.0 / 48.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	384 KB	Output is correct
2	Correct	5 ms	384 KB	Output is correct
3	Correct	5 ms	512 KB	Output is correct
4	Correct	5 ms	1152 KB	Output is correct
5	Correct	5 ms	768 KB	Output is correct
6	Correct	6 ms	1408 KB	Output is correct
7	Correct	5 ms	896 KB	Output is correct
8	Correct	6 ms	1408 KB	Output is correct
9	Correct	5 ms	768 KB	Output is correct
10	Correct	5 ms	1792 KB	Output is correct
11	Correct	5 ms	384 KB	Output is correct
12	Correct	6 ms	2304 KB	Output is correct

Subtask #2

52.0 / 52.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	384 KB	Output is correct
2	Correct	5 ms	384 KB	Output is correct
3	Correct	5 ms	512 KB	Output is correct
4	Correct	5 ms	1152 KB	Output is correct
5	Correct	5 ms	768 KB	Output is correct
6	Correct	6 ms	1408 KB	Output is correct
7	Correct	5 ms	896 KB	Output is correct
8	Correct	6 ms	1408 KB	Output is correct
9	Correct	5 ms	768 KB	Output is correct
10	Correct	5 ms	1792 KB	Output is correct
11	Correct	5 ms	384 KB	Output is correct
12	Correct	6 ms	2304 KB	Output is correct
13	Correct	4 ms	384 KB	Output is correct
14	Correct	9 ms	9728 KB	Output is correct
15	Correct	85 ms	55136 KB	Output is correct
16	Correct	12 ms	4096 KB	Output is correct
17	Correct	22 ms	12928 KB	Output is correct
18	Correct	27 ms	17144 KB	Output is correct
19	Correct	116 ms	62968 KB	Output is correct
20	Correct	74 ms	50936 KB	Output is correct
21	Correct	54 ms	33784 KB	Output is correct
22	Correct	50 ms	35448 KB	Output is correct
23	Correct	37 ms	27128 KB	Output is correct
24	Correct	117 ms	70780 KB	Output is correct
25	Correct	96 ms	61172 KB	Output is correct
26	Correct	106 ms	66552 KB	Output is correct
27	Correct	117 ms	68984 KB	Output is correct