Submission #898472

# Submission time Handle Problem Language Result Execution time Memory
898472 2024-01-04T17:56:19 Z maxFedorchuk Tents (JOI18_tents) C++17
100 / 100
174 ms 62924 KB
#include <bits/stdc++.h>
using namespace std;

const long long MOD=1e9+7;

const long long MX=3300;

long long dp[MX][MX];

long long cntdp(long long n,long long m)
{
    if(n<=0 || m<=0)
    {
        return 1;
    }

    if(dp[n][m])
    {
        return dp[n][m];
    }

    dp[n][m]=cntdp(n-1,m);

    dp[n][m]=(cntdp(n-1,m-1)*4*m+dp[n][m])%MOD;

    dp[n][m]=((cntdp(n-1,m-2)*(m*(m-1)/2))%MOD+dp[n][m])%MOD;

    dp[n][m]=((cntdp(n-2,m-1)*m*(n-1))%MOD+dp[n][m])%MOD;

    return dp[n][m];
}
int main()
{
    cin.tie(0);
    ios_base::sync_with_stdio(0);

    long long n,m;
    cin>>n>>m;

    cout<<(cntdp(n,m)-1+MOD)%MOD<<"\n";
    return 0;
}
# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 1116 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 1372 KB Output is correct
7 Correct 1 ms 860 KB Output is correct
8 Correct 1 ms 1372 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 2 ms 1884 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 2 ms 2140 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 1116 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 1372 KB Output is correct
7 Correct 1 ms 860 KB Output is correct
8 Correct 1 ms 1372 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 2 ms 1884 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 2 ms 2140 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 4 ms 9820 KB Output is correct
15 Correct 119 ms 47680 KB Output is correct
16 Correct 2 ms 1632 KB Output is correct
17 Correct 11 ms 6960 KB Output is correct
18 Correct 25 ms 13664 KB Output is correct
19 Correct 139 ms 53356 KB Output is correct
20 Correct 93 ms 42328 KB Output is correct
21 Correct 53 ms 25444 KB Output is correct
22 Correct 61 ms 30824 KB Output is correct
23 Correct 41 ms 26720 KB Output is correct
24 Correct 174 ms 62924 KB Output is correct
25 Correct 117 ms 50084 KB Output is correct
26 Correct 141 ms 57260 KB Output is correct
27 Correct 150 ms 60764 KB Output is correct