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답안 #98783

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
98783 2019-02-25T21:03:43 Z luciocf Tents (JOI18_tents) C++14
100 / 100
 125 ms 71036 KB 
#include <bits/stdc++.h>

using namespace std;

const int maxn = 3e3+10;
const long long mod = 1e9+7;

typedef long long ll;

ll dp[maxn][maxn];

int main(void)
{
	int n, m;
	cin >> n >> m;

	for (int i = 0; i < maxn; i++)
		dp[i][0] = dp[0][i] = 1LL;

	for (int i = 1; i <= n; i++)
	{
		for (int j = 1; j <= m; j++)
		{
			dp[i][j] = dp[i-1][j];

			dp[i][j] = (dp[i][j] + (dp[i-1][j-1]*4LL*(ll)j))%mod;

			if (j >= 2) 
				dp[i][j] = (dp[i][j] + (dp[i-1][j-2] * 1LL*(j*(j-1))/2))%mod;

			if (i >= 2) 
				dp[i][j] = (dp[i][j] + (dp[i-2][j-1] * 1LL*(j*(i-1))))%mod;
		}
	}

	cout << dp[n][m]-1LL << "\n";
}

Subtask #1
48.0 / 48.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 12544 KB Output is correct
2 Correct 11 ms 12544 KB Output is correct
3 Correct 12 ms 12544 KB Output is correct
4 Correct 8 ms 12544 KB Output is correct
5 Correct 12 ms 12672 KB Output is correct
6 Correct 11 ms 12672 KB Output is correct
7 Correct 12 ms 12800 KB Output is correct
8 Correct 12 ms 12672 KB Output is correct
9 Correct 11 ms 12544 KB Output is correct
10 Correct 12 ms 12800 KB Output is correct
11 Correct 11 ms 12544 KB Output is correct
12 Correct 13 ms 13184 KB Output is correct

Subtask #2
52.0 / 52.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 12544 KB Output is correct
2 Correct 11 ms 12544 KB Output is correct
3 Correct 12 ms 12544 KB Output is correct
4 Correct 8 ms 12544 KB Output is correct
5 Correct 12 ms 12672 KB Output is correct
6 Correct 11 ms 12672 KB Output is correct
7 Correct 12 ms 12800 KB Output is correct
8 Correct 12 ms 12672 KB Output is correct
9 Correct 11 ms 12544 KB Output is correct
10 Correct 12 ms 12800 KB Output is correct
11 Correct 11 ms 12544 KB Output is correct
12 Correct 13 ms 13184 KB Output is correct
13 Correct 10 ms 12544 KB Output is correct
14 Correct 10 ms 12544 KB Output is correct
15 Correct 81 ms 56184 KB Output is correct
16 Correct 16 ms 15360 KB Output is correct
17 Correct 29 ms 22272 KB Output is correct
18 Correct 38 ms 24568 KB Output is correct
19 Correct 98 ms 63340 KB Output is correct
20 Correct 85 ms 53240 KB Output is correct
21 Correct 61 ms 39288 KB Output is correct
22 Correct 52 ms 38904 KB Output is correct
23 Correct 39 ms 27128 KB Output is correct
24 Correct 125 ms 71036 KB Output is correct
25 Correct 91 ms 63096 KB Output is correct
26 Correct 109 ms 67576 KB Output is correct
27 Correct 117 ms 69524 KB Output is correct