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Submission #202185

# Submission time Handle Problem Language Result Execution time Memory
202185 2020-02-14T05:00:22 Z nvmdava Tents (JOI18_tents) C++17
100 / 100
 69 ms 70904 KB 
#include <bits/stdc++.h>
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define ll long long
#define ff first
#define ss second
#define N 3005
#define MOD 1000000007
#define INF 0x3f3f3f3f

ll dp[N][N];
ll c[N][N];

int main(){
    ios_base::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] + (j >= 2 ? j * (j - 1) / 2 * dp[i - 1][j - 2] : 0) + 4 * j * dp[i - 1][j - 1] + (i >= 2 ? dp[i - 2][j - 1] * j * (i - 1) : 0)) % MOD;
    cout<<(dp[n][m] + MOD - 1) % MOD;
}

Subtask #1
48.0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 380 KB Output is correct
3 Correct 5 ms 504 KB Output is correct
4 Correct 5 ms 1144 KB Output is correct
5 Correct 5 ms 760 KB Output is correct
6 Correct 5 ms 1404 KB Output is correct
7 Correct 5 ms 888 KB Output is correct
8 Correct 5 ms 1528 KB Output is correct
9 Correct 5 ms 888 KB Output is correct
10 Correct 6 ms 1912 KB Output is correct
11 Correct 5 ms 380 KB Output is correct
12 Correct 6 ms 2296 KB Output is correct

Subtask #2
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 380 KB Output is correct
3 Correct 5 ms 504 KB Output is correct
4 Correct 5 ms 1144 KB Output is correct
5 Correct 5 ms 760 KB Output is correct
6 Correct 5 ms 1404 KB Output is correct
7 Correct 5 ms 888 KB Output is correct
8 Correct 5 ms 1528 KB Output is correct
9 Correct 5 ms 888 KB Output is correct
10 Correct 6 ms 1912 KB Output is correct
11 Correct 5 ms 380 KB Output is correct
12 Correct 6 ms 2296 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 9 ms 9720 KB Output is correct
15 Correct 49 ms 55160 KB Output is correct
16 Correct 8 ms 4088 KB Output is correct
17 Correct 16 ms 12920 KB Output is correct
18 Correct 18 ms 17144 KB Output is correct
19 Correct 55 ms 62968 KB Output is correct
20 Correct 47 ms 50936 KB Output is correct
21 Correct 32 ms 33784 KB Output is correct
22 Correct 33 ms 35448 KB Output is correct
23 Correct 24 ms 27132 KB Output is correct
24 Correct 69 ms 70904 KB Output is correct
25 Correct 56 ms 61304 KB Output is correct
26 Correct 64 ms 66680 KB Output is correct
27 Correct 66 ms 69116 KB Output is correct