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Submission #1109772

# Submission time Handle Problem Language Result Execution time Memory
1109772 2024-11-07T14:21:40 Z ttamx Tents (JOI18_tents) C++17
100 / 100
 34 ms 71024 KB 
#include<bits/stdc++.h>

using namespace std;

using ll = long long;

const int N=3005;
const int MOD=1e9+7;

int h,w;
ll dp[N][N];

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> h >> w;
    for(int i=0;i<=h;i++){
        dp[i][0]=1;
    }
    for(int i=0;i<=w;i++){
        dp[0][i]=1;
    }
    for(int i=1;i<=h;i++){
        for(int j=1;j<=w;j++){
            dp[i][j]+=dp[i-1][j];
            dp[i][j]+=dp[i-1][j-1]*j*4;
            if(i>=2){
                dp[i][j]+=dp[i-2][j-1]*(i-1)*j;
            }
            if(j>=2){
                dp[i][j]+=dp[i-1][j-2]*(1LL*j*(j-1)/2);
            }
            dp[i][j]%=MOD;
        }
    }
    cout << (dp[h][w]-1+MOD)%MOD;
}

Subtask #1
48.0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 2384 KB Output is correct
4 Correct 2 ms 6648 KB Output is correct
5 Correct 1 ms 2384 KB Output is correct
6 Correct 2 ms 6480 KB Output is correct
7 Correct 1 ms 2384 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 1 ms 4432 KB Output is correct
10 Correct 2 ms 8528 KB Output is correct
11 Correct 1 ms 2552 KB Output is correct
12 Correct 2 ms 8528 KB Output is correct

Subtask #2
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 2384 KB Output is correct
4 Correct 2 ms 6648 KB Output is correct
5 Correct 1 ms 2384 KB Output is correct
6 Correct 2 ms 6480 KB Output is correct
7 Correct 1 ms 2384 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 1 ms 4432 KB Output is correct
10 Correct 2 ms 8528 KB Output is correct
11 Correct 1 ms 2552 KB Output is correct
12 Correct 2 ms 8528 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 7 ms 55888 KB Output is correct
15 Correct 23 ms 66128 KB Output is correct
16 Correct 3 ms 6736 KB Output is correct
17 Correct 6 ms 16976 KB Output is correct
18 Correct 8 ms 29436 KB Output is correct
19 Correct 26 ms 70404 KB Output is correct
20 Correct 22 ms 58104 KB Output is correct
21 Correct 15 ms 39504 KB Output is correct
22 Correct 16 ms 51792 KB Output is correct
23 Correct 14 ms 70480 KB Output is correct
24 Correct 34 ms 71024 KB Output is correct
25 Correct 24 ms 62032 KB Output is correct
26 Correct 28 ms 68176 KB Output is correct
27 Correct 31 ms 70224 KB Output is correct