oj.uz

Submission #362236

# Submission time Handle Problem Language Result Execution time Memory
362236 2021-02-02T10:18:46 Z ritul_kr_singh Tents (JOI18_tents) C++14
100 / 100
 136 ms 70764 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long

int mod = 1000000007;

signed main(){
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    int n, m; cin >> n >> m;
    int dp[n+1][m+1];
    for(int i=0; i<=n; ++i){
        for(int j=0; j<=m; ++j){
            dp[i][j] = ((!i) || (!j));
        }
    }
    for(int i=1; i<=n; ++i){
        for(int j=1; j<=m; ++j){
            dp[i][j] += dp[i][j-1] + 4LL*i*dp[i-1][j-1];
            dp[i][j] += j>1 ? i*(j-1LL)*dp[i-1][j-2] : 0LL;
            dp[i][j] += i>1 ? ((i*(i-1LL))/2LL)*dp[i-2][j-1] : 0LL;
            dp[i][j] %= mod;
        }
    }
    cout << dp[n][m]-1LL << "\n";
}

Subtask #1
48.0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 492 KB Output is correct
6 Correct 1 ms 492 KB Output is correct
7 Correct 1 ms 512 KB Output is correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 640 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 2 ms 1004 KB Output is correct

Subtask #2
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 492 KB Output is correct
6 Correct 1 ms 492 KB Output is correct
7 Correct 1 ms 512 KB Output is correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 640 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 2 ms 1004 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 84 ms 44140 KB Output is correct
16 Correct 6 ms 3180 KB Output is correct
17 Correct 19 ms 10240 KB Output is correct
18 Correct 24 ms 12532 KB Output is correct
19 Correct 98 ms 51308 KB Output is correct
20 Correct 78 ms 41068 KB Output is correct
21 Correct 51 ms 27264 KB Output is correct
22 Correct 53 ms 26988 KB Output is correct
23 Correct 29 ms 14956 KB Output is correct
24 Correct 136 ms 70764 KB Output is correct
25 Correct 103 ms 52588 KB Output is correct
26 Correct 115 ms 60268 KB Output is correct
27 Correct 130 ms 68076 KB Output is correct