oj.uz

답안 #706286

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
706286 2023-03-06T08:55:34 Z lukameladze Tents (JOI18_tents) C++14
100 / 100
 121 ms 70860 KB 
# include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define int long long
using namespace std;
const int N = 3005, mod = 1e9 + 7;
int n, m, dp[N][N];
int C(int n, int k) {
    return n * (n - 1) / 2;
}
main() {
    cin>>n>>m;
    for (int i = 0; i <= max(n,m); i++) dp[0][i] = dp[i][0] = 1;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            dp[i][j] += dp[i - 1][j];
            if (j >= 2) dp[i][j] = (dp[i][j] + dp[i - 1][j - 2] * C(j, 2)) % mod;
            dp[i][j] = (dp[i][j] + (dp[i - 1][j - 1] * 4 * j) % mod) % mod; 
            if (i >= 2) dp[i][j] += dp[i - 2][j - 1] * j * (i - 1) % mod;
            dp[i][j] %= mod;
        }
    }
    dp[n][m] = (dp[n][m] - 1 + mod) % mod;
    cout<<dp[n][m]<<"\n";
}

Compilation message

tents.cpp:12:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   12 | main() {
      | ^~~~

Subtask #1
48.0 / 48.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 980 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 1460 KB Output is correct
6 Correct 1 ms 1336 KB Output is correct
7 Correct 1 ms 1364 KB Output is correct
8 Correct 1 ms 1364 KB Output is correct
9 Correct 1 ms 736 KB Output is correct
10 Correct 2 ms 1720 KB Output is correct
11 Correct 1 ms 1492 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 1 ms 340 KB Output is correct
2 Correct 1 ms 980 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 1460 KB Output is correct
6 Correct 1 ms 1336 KB Output is correct
7 Correct 1 ms 1364 KB Output is correct
8 Correct 1 ms 1364 KB Output is correct
9 Correct 1 ms 736 KB Output is correct
10 Correct 2 ms 1720 KB Output is correct
11 Correct 1 ms 1492 KB Output is correct
12 Correct 2 ms 2132 KB Output is correct
13 Correct 3 ms 7764 KB Output is correct
14 Correct 5 ms 9684 KB Output is correct
15 Correct 72 ms 55164 KB Output is correct
16 Correct 7 ms 9428 KB Output is correct
17 Correct 18 ms 17324 KB Output is correct
18 Correct 22 ms 17792 KB Output is correct
19 Correct 83 ms 62924 KB Output is correct
20 Correct 66 ms 50848 KB Output is correct
21 Correct 45 ms 35404 KB Output is correct
22 Correct 47 ms 35404 KB Output is correct
23 Correct 34 ms 27016 KB Output is correct
24 Correct 107 ms 70860 KB Output is correct
25 Correct 83 ms 61164 KB Output is correct
26 Correct 94 ms 66600 KB Output is correct
27 Correct 121 ms 69168 KB Output is correct