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답안 #523413

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
523413 2022-02-07T15:34:25 Z CPSC Tents (JOI18_tents) C++14
100 / 100
 134 ms 70836 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 - 1][j - 2] * C(j,2);
            dp[i][j] %= mod;
           
            dp[i][j] += dp[i - 1][j - 1] * 4*j;dp[i][j] %= mod;
            if (i >= 2)
            dp[i][j] += dp[i - 2][j - 1] * j * (i - 1);
            dp[i][j] %= mod;
        }
    }
    dp[n][m] --;
    if (dp[n][m] < 0) dp[n][m] += mod;
    cout<<dp[n][m]<<endl;
}

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 328 KB Output is correct
2 Correct 1 ms 920 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 1 ms 1100 KB Output is correct
5 Correct 2 ms 1456 KB Output is correct
6 Correct 1 ms 1356 KB Output is correct
7 Correct 1 ms 1356 KB Output is correct
8 Correct 1 ms 1356 KB Output is correct
9 Correct 1 ms 716 KB Output is correct
10 Correct 1 ms 1740 KB Output is correct
11 Correct 1 ms 1452 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 328 KB Output is correct
2 Correct 1 ms 920 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 1 ms 1100 KB Output is correct
5 Correct 2 ms 1456 KB Output is correct
6 Correct 1 ms 1356 KB Output is correct
7 Correct 1 ms 1356 KB Output is correct
8 Correct 1 ms 1356 KB Output is correct
9 Correct 1 ms 716 KB Output is correct
10 Correct 1 ms 1740 KB Output is correct
11 Correct 1 ms 1452 KB Output is correct
12 Correct 2 ms 2124 KB Output is correct
13 Correct 4 ms 7712 KB Output is correct
14 Correct 4 ms 9548 KB Output is correct
15 Correct 72 ms 55052 KB Output is correct
16 Correct 7 ms 9292 KB Output is correct
17 Correct 17 ms 17344 KB Output is correct
18 Correct 20 ms 17712 KB Output is correct
19 Correct 80 ms 62900 KB Output is correct
20 Correct 65 ms 50860 KB Output is correct
21 Correct 46 ms 35412 KB Output is correct
22 Correct 43 ms 35372 KB Output is correct
23 Correct 27 ms 27040 KB Output is correct
24 Correct 104 ms 70836 KB Output is correct
25 Correct 74 ms 61124 KB Output is correct
26 Correct 93 ms 66588 KB Output is correct
27 Correct 134 ms 69060 KB Output is correct