답안 #898472

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
898472	2024-01-04T17:56:19 Z	maxFedorchuk	Tents (JOI18_tents)	C++17	100 / 100	174 ms	62924 KB

tents

#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;
}

Subtask #1

48.0 / 48.0

#	결과	실행 시간	메모리	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

Subtask #2

52.0 / 52.0

#	결과	실행 시간	메모리	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