Submission #116176

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
116176	2019-06-11T05:09:46 Z	dolphingarlic	Tents (JOI18_tents)	C++14	100 / 100	160 ms	70776 KB

tents

#include <bits/stdc++.h>
#define FOR(i, x, y) for (int i = x; i < y; i++)
#define MOD 1000000007
using namespace std;
typedef long long ll;

ll dp[3001][3001];

int main() {
	int h, w;
	cin >> h >> w;
	dp[0][0] = 1;
	FOR(i, 0, h + 1) {
		FOR(j, 0, w + 1) {
			if(i == 0 || j == 0) dp[i][j] = 1;
			else {
				dp[i][j] = (dp[i][j] + dp[i - 1][j]) % MOD;
				dp[i][j] = (dp[i][j] + 4ll * j * dp[i - 1][j - 1]) % MOD;
				if(j > 1) dp[i][j] = (dp[i][j] + 1ll * (1ll * j * (j - 1) / 2) * dp[i - 1][j - 2]) % MOD;
	            if(i > 1) dp[i][j] = (dp[i][j] + 1ll * j * (i - 1) * dp[i - 2][j - 1]) % MOD;
			}
		}
	}
	cout << dp[h][w] - 1 << '\n';
 	return 0;
}

Subtask #1

48.0 / 48.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	256 KB	Output is correct
2	Correct	2 ms	384 KB	Output is correct
3	Correct	2 ms	512 KB	Output is correct
4	Correct	3 ms	1152 KB	Output is correct
5	Correct	2 ms	768 KB	Output is correct
6	Correct	3 ms	1408 KB	Output is correct
7	Correct	2 ms	896 KB	Output is correct
8	Correct	3 ms	1536 KB	Output is correct
9	Correct	2 ms	896 KB	Output is correct
10	Correct	4 ms	1792 KB	Output is correct
11	Correct	2 ms	384 KB	Output is correct
12	Correct	4 ms	2304 KB	Output is correct

Subtask #2

52.0 / 52.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	256 KB	Output is correct
2	Correct	2 ms	384 KB	Output is correct
3	Correct	2 ms	512 KB	Output is correct
4	Correct	3 ms	1152 KB	Output is correct
5	Correct	2 ms	768 KB	Output is correct
6	Correct	3 ms	1408 KB	Output is correct
7	Correct	2 ms	896 KB	Output is correct
8	Correct	3 ms	1536 KB	Output is correct
9	Correct	2 ms	896 KB	Output is correct
10	Correct	4 ms	1792 KB	Output is correct
11	Correct	2 ms	384 KB	Output is correct
12	Correct	4 ms	2304 KB	Output is correct
13	Correct	2 ms	384 KB	Output is correct
14	Correct	8 ms	9728 KB	Output is correct
15	Correct	123 ms	55232 KB	Output is correct
16	Correct	9 ms	4096 KB	Output is correct
17	Correct	27 ms	12800 KB	Output is correct
18	Correct	33 ms	17144 KB	Output is correct
19	Correct	125 ms	62980 KB	Output is correct
20	Correct	102 ms	50916 KB	Output is correct
21	Correct	66 ms	33784 KB	Output is correct
22	Correct	71 ms	35448 KB	Output is correct
23	Correct	46 ms	27100 KB	Output is correct
24	Correct	160 ms	70776 KB	Output is correct
25	Correct	124 ms	61120 KB	Output is correct
26	Correct	140 ms	66576 KB	Output is correct
27	Correct	152 ms	68984 KB	Output is correct