답안 #798141

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
798141	2023-07-30T11:49:18 Z	vjudge1	Tents (JOI18_tents)	C++17	100 / 100	89 ms	70900 KB

tents

#include<bits/stdc++.h>

using namespace std;
using ll = long long;

const int N = 3000;
const int MOD = 1e9 + 7;
ll dp[N + 10][N + 10];

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    int n, m;
    cin >> n >> m;
    for(int i = 0; i <= n; i++) dp[i][0] = 1;
    for(int j = 0; j <= m; j++) dp[0][j] = 1;
    for(int i = 1; i <= n; i++) {
        for(int j = 1; j <= m; j++) {
            dp[i][j] += dp[i - 1][j];
            dp[i][j] += 4 * j * dp[i - 1][j - 1] % MOD;
            if(j > 1) dp[i][j] += j * (j - 1) / 2 * dp[i - 1][j - 2] % MOD;
            if(i > 1) dp[i][j] += (i - 1) * j * dp[i - 2][j - 1] % MOD;
            dp[i][j] %= MOD;
        }
    }
    cout << (dp[n][m] - 1 + MOD) % MOD;
}

Subtask #1

48.0 / 48.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	1 ms	468 KB	Output is correct
4	Correct	1 ms	1108 KB	Output is correct
5	Correct	1 ms	596 KB	Output is correct
6	Correct	1 ms	1364 KB	Output is correct
7	Correct	1 ms	724 KB	Output is correct
8	Correct	1 ms	1364 KB	Output is correct
9	Correct	0 ms	724 KB	Output is correct
10	Correct	1 ms	1748 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	2 ms	2132 KB	Output is correct

Subtask #2

52.0 / 52.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	1 ms	468 KB	Output is correct
4	Correct	1 ms	1108 KB	Output is correct
5	Correct	1 ms	596 KB	Output is correct
6	Correct	1 ms	1364 KB	Output is correct
7	Correct	1 ms	724 KB	Output is correct
8	Correct	1 ms	1364 KB	Output is correct
9	Correct	0 ms	724 KB	Output is correct
10	Correct	1 ms	1748 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	2 ms	2132 KB	Output is correct
13	Correct	0 ms	340 KB	Output is correct
14	Correct	3 ms	9684 KB	Output is correct
15	Correct	62 ms	55112 KB	Output is correct
16	Correct	4 ms	4052 KB	Output is correct
17	Correct	17 ms	12756 KB	Output is correct
18	Correct	18 ms	16980 KB	Output is correct
19	Correct	71 ms	63088 KB	Output is correct
20	Correct	56 ms	50896 KB	Output is correct
21	Correct	43 ms	33808 KB	Output is correct
22	Correct	38 ms	35356 KB	Output is correct
23	Correct	25 ms	27084 KB	Output is correct
24	Correct	89 ms	70900 KB	Output is correct
25	Correct	71 ms	61292 KB	Output is correct
26	Correct	81 ms	66832 KB	Output is correct
27	Correct	89 ms	69020 KB	Output is correct