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답안 #43978

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
43978 2018-03-29T02:55:12 Z MatheusLealV Tents (JOI18_tents) C++17
100 / 100
 314 ms 72800 KB 
#include <bits/stdc++.h>
#define N 3030
#define mod (1000000007)
using namespace std;
typedef long long ll;

ll H, W, dp[N][N];

ll solve(int lf, int cf)
{
	if(lf < 0 || cf < 0) return 0;

	if(!lf || !cf) return 1;

	if(dp[lf][cf] != -1) return dp[lf][cf];

	ll nao_coloca = solve(lf - 1, cf), coloca1 = solve(lf - 1, cf - 1)*4*cf;

	ll coloca2 = solve(lf - 1, cf - 2)*cf*(cf - 1)/2, coloca2row = solve(lf - 2, cf - 1)*cf*(lf - 1);

	return dp[lf][cf] = (nao_coloca + coloca1 + coloca2 + coloca2row)%mod;
}

int main()
{
	ios::sync_with_stdio(false); cin.tie(0);

	cin>>H>>W;

	memset(dp, -1, sizeof dp);

	cout<<(solve(H, W) + mod - 1)%mod<<"\n";
}

Subtask #1
48.0 / 48.0

# 결과 실행 시간 메모리 Grader output
1 Correct 55 ms 72184 KB Output is correct
2 Correct 54 ms 72204 KB Output is correct
3 Correct 54 ms 72204 KB Output is correct
4 Correct 54 ms 72276 KB Output is correct
5 Correct 55 ms 72308 KB Output is correct
6 Correct 57 ms 72436 KB Output is correct
7 Correct 57 ms 72436 KB Output is correct
8 Correct 55 ms 72496 KB Output is correct
9 Correct 55 ms 72496 KB Output is correct
10 Correct 56 ms 72496 KB Output is correct
11 Correct 54 ms 72496 KB Output is correct
12 Correct 61 ms 72496 KB Output is correct

Subtask #2
52.0 / 52.0

# 결과 실행 시간 메모리 Grader output
1 Correct 55 ms 72184 KB Output is correct
2 Correct 54 ms 72204 KB Output is correct
3 Correct 54 ms 72204 KB Output is correct
4 Correct 54 ms 72276 KB Output is correct
5 Correct 55 ms 72308 KB Output is correct
6 Correct 57 ms 72436 KB Output is correct
7 Correct 57 ms 72436 KB Output is correct
8 Correct 55 ms 72496 KB Output is correct
9 Correct 55 ms 72496 KB Output is correct
10 Correct 56 ms 72496 KB Output is correct
11 Correct 54 ms 72496 KB Output is correct
12 Correct 61 ms 72496 KB Output is correct
13 Correct 54 ms 72496 KB Output is correct
14 Correct 56 ms 72540 KB Output is correct
15 Correct 218 ms 72700 KB Output is correct
16 Correct 53 ms 72700 KB Output is correct
17 Correct 69 ms 72700 KB Output is correct
18 Correct 100 ms 72700 KB Output is correct
19 Correct 237 ms 72700 KB Output is correct
20 Correct 199 ms 72700 KB Output is correct
21 Correct 144 ms 72700 KB Output is correct
22 Correct 148 ms 72700 KB Output is correct
23 Correct 111 ms 72700 KB Output is correct
24 Correct 314 ms 72708 KB Output is correct
25 Correct 235 ms 72708 KB Output is correct
26 Correct 284 ms 72708 KB Output is correct
27 Correct 308 ms 72800 KB Output is correct