답안 #899420

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
899420	2024-01-06T06:43:15 Z	MongHwa	Tents (JOI18_tents)	C++17	100 / 100	146 ms	71384 KB

tents

#include <iostream>
#include <cstring>
using namespace std;

#define ll long long
#define MOD 1000000007

ll dp[3005][3005];

ll go(int x, int y)
{
	if(x == 0 || y == 0)
		return 1;
	
	ll& ret = dp[x][y];
	if(ret != -1)
		return ret;

	ret = 0;
	ret += go(x-1, y);
	ret %= MOD;

	if(y > 0)
		ret += 4*y*go(x-1, y-1) % MOD;
	ret %= MOD;

	if(x > 1 && y > 0)
		ret += (x-1)*y*go(x-2, y-1) % MOD;
	ret %= MOD;

	if(y > 1)
		ret += (y*(y-1))/2 % MOD * go(x-1, y-2);
	ret %= MOD;

	return ret;
}

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

	memset(dp, -1, sizeof(dp));

	int h, w;
	cin >> h >> w;

	cout << (go(h, w) - 1 + MOD) % MOD << '\n';
}

Subtask #1

48.0 / 48.0

#	결과	실행 시간	메모리	Grader output
1	Correct	16 ms	71256 KB	Output is correct
2	Correct	9 ms	71004 KB	Output is correct
3	Correct	9 ms	71004 KB	Output is correct
4	Correct	9 ms	71068 KB	Output is correct
5	Correct	10 ms	70900 KB	Output is correct
6	Correct	9 ms	71004 KB	Output is correct
7	Correct	9 ms	71004 KB	Output is correct
8	Correct	9 ms	71004 KB	Output is correct
9	Correct	9 ms	71004 KB	Output is correct
10	Correct	10 ms	71076 KB	Output is correct
11	Correct	10 ms	71004 KB	Output is correct
12	Correct	11 ms	71088 KB	Output is correct

Subtask #2

52.0 / 52.0

#	결과	실행 시간	메모리	Grader output
1	Correct	16 ms	71256 KB	Output is correct
2	Correct	9 ms	71004 KB	Output is correct
3	Correct	9 ms	71004 KB	Output is correct
4	Correct	9 ms	71068 KB	Output is correct
5	Correct	10 ms	70900 KB	Output is correct
6	Correct	9 ms	71004 KB	Output is correct
7	Correct	9 ms	71004 KB	Output is correct
8	Correct	9 ms	71004 KB	Output is correct
9	Correct	9 ms	71004 KB	Output is correct
10	Correct	10 ms	71076 KB	Output is correct
11	Correct	10 ms	71004 KB	Output is correct
12	Correct	11 ms	71088 KB	Output is correct
13	Correct	9 ms	71004 KB	Output is correct
14	Correct	9 ms	71260 KB	Output is correct
15	Correct	105 ms	71372 KB	Output is correct
16	Correct	10 ms	71004 KB	Output is correct
17	Correct	19 ms	71212 KB	Output is correct
18	Correct	30 ms	71004 KB	Output is correct
19	Correct	118 ms	71384 KB	Output is correct
20	Correct	92 ms	71256 KB	Output is correct
21	Correct	58 ms	71132 KB	Output is correct
22	Correct	64 ms	71256 KB	Output is correct
23	Correct	42 ms	71260 KB	Output is correct
24	Correct	146 ms	71256 KB	Output is correct
25	Correct	125 ms	71260 KB	Output is correct
26	Correct	126 ms	71256 KB	Output is correct
27	Correct	139 ms	71260 KB	Output is correct