답안 #799876

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
799876	2023-08-01T07:26:37 Z	phoenix	Tents (JOI18_tents)	C++17	100 / 100	94 ms	71068 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	1 ms	212 KB	Output is correct
2	Correct	1 ms	340 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	720 KB	Output is correct
6	Correct	1 ms	1364 KB	Output is correct
7	Correct	1 ms	852 KB	Output is correct
8	Correct	1 ms	1364 KB	Output is correct
9	Correct	1 ms	716 KB	Output is correct
10	Correct	1 ms	1748 KB	Output is correct
11	Correct	1 ms	340 KB	Output is correct
12	Correct	2 ms	2124 KB	Output is correct

Subtask #2

52.0 / 52.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	1 ms	340 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	720 KB	Output is correct
6	Correct	1 ms	1364 KB	Output is correct
7	Correct	1 ms	852 KB	Output is correct
8	Correct	1 ms	1364 KB	Output is correct
9	Correct	1 ms	716 KB	Output is correct
10	Correct	1 ms	1748 KB	Output is correct
11	Correct	1 ms	340 KB	Output is correct
12	Correct	2 ms	2124 KB	Output is correct
13	Correct	1 ms	340 KB	Output is correct
14	Correct	4 ms	9612 KB	Output is correct
15	Correct	63 ms	55136 KB	Output is correct
16	Correct	4 ms	4052 KB	Output is correct
17	Correct	14 ms	12876 KB	Output is correct
18	Correct	18 ms	17100 KB	Output is correct
19	Correct	72 ms	62924 KB	Output is correct
20	Correct	59 ms	50852 KB	Output is correct
21	Correct	40 ms	33812 KB	Output is correct
22	Correct	39 ms	35424 KB	Output is correct
23	Correct	25 ms	27092 KB	Output is correct
24	Correct	94 ms	71068 KB	Output is correct
25	Correct	73 ms	61332 KB	Output is correct
26	Correct	83 ms	66740 KB	Output is correct
27	Correct	89 ms	69132 KB	Output is correct