답안 #236887

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
236887	2020-06-03T16:17:19 Z	islingr	Tents (JOI18_tents)	C++14	100 / 100	180 ms	72568 KB

tents

#include <iostream>
using namespace std;

#define rep(i, a, b) for (ll i = (a); i <= (b); ++i)

using ll = long long;

const int N = 3 << 10, M = 1e9 + 7;
ll dp[N][N];

signed main() {
	int h, w; cin >> h >> w;
	rep(i, 0, h) dp[i][0] = 1;
	rep(j, 0, w) dp[0][j] = 1;
	rep(i, 1, h) {
		rep(j, 1, w) {
			auto add = [&](ll x) {
				dp[i][j] += x;
				if (M <= dp[i][j]) dp[i][j] -= M;
			};
			if (i != 1) add(i * (i - 1) / 2 % M * dp[i - 2][j - 1] % M);
			add(4 * i * dp[i - 1][j - 1] % M);
			add(dp[i][j - 1]);
			if (j != 1) add(i * (j - 1) % M * dp[i - 1][j - 2] % M);
		}
	}
	cout << (dp[h][w] + M - 1) % M;
}

Subtask #1

48.0 / 48.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	256 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	896 KB	Output is correct
6	Correct	5 ms	1280 KB	Output is correct
7	Correct	5 ms	1024 KB	Output is correct
8	Correct	5 ms	1408 KB	Output is correct
9	Correct	5 ms	896 KB	Output is correct
10	Correct	7 ms	2688 KB	Output is correct
11	Correct	5 ms	384 KB	Output is correct
12	Correct	7 ms	2688 KB	Output is correct

Subtask #2

52.0 / 52.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	256 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	896 KB	Output is correct
6	Correct	5 ms	1280 KB	Output is correct
7	Correct	5 ms	1024 KB	Output is correct
8	Correct	5 ms	1408 KB	Output is correct
9	Correct	5 ms	896 KB	Output is correct
10	Correct	7 ms	2688 KB	Output is correct
11	Correct	5 ms	384 KB	Output is correct
12	Correct	7 ms	2688 KB	Output is correct
13	Correct	5 ms	384 KB	Output is correct
14	Correct	8 ms	9728 KB	Output is correct
15	Correct	120 ms	55800 KB	Output is correct
16	Correct	12 ms	3968 KB	Output is correct
17	Correct	33 ms	14200 KB	Output is correct
18	Correct	39 ms	18944 KB	Output is correct
19	Correct	142 ms	70392 KB	Output is correct
20	Correct	108 ms	49400 KB	Output is correct
21	Correct	74 ms	33516 KB	Output is correct
22	Correct	75 ms	35064 KB	Output is correct
23	Correct	52 ms	36472 KB	Output is correct
24	Correct	180 ms	72568 KB	Output is correct
25	Correct	139 ms	62712 KB	Output is correct
26	Correct	168 ms	68216 KB	Output is correct
27	Correct	176 ms	70520 KB	Output is correct