oj.uz

답안 #887736

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
887736 2023-12-15T06:41:56 Z vjudge1 Tents (JOI18_tents) C++17
100 / 100
 23 ms 504 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long int 
const int mxn=3e3+2,M=1e9+7;
int n,m;
ll dp[3][mxn];
int main(){
	cin>>n>>m;
	for(int i=0;i<=m;i++){
		dp[0][i]=1;
	}
	dp[1][0]=dp[2][0]=1;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			ll x1=(j>1)?(j*(j-1))/2*dp[(i+2)%3][j-2]:0;
			ll x2=(i>1)?j*(i-1)*dp[(i+1)%3][j-1]:0;
			ll x3=j*4*dp[(i+2)%3][j-1];
			ll x4=dp[(i+2)%3][j];
			dp[i%3][j]=(x1+x2+x3+x4)%M;
			//cout<<dp[i%3][j]<<" ";
		}
		//cout<<endl;
	}
	cout<<dp[n%3][m]-1<<endl;
}

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 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 440 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 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 440 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 14 ms 504 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 4 ms 488 KB Output is correct
18 Correct 6 ms 348 KB Output is correct
19 Correct 17 ms 500 KB Output is correct
20 Correct 13 ms 344 KB Output is correct
21 Correct 9 ms 344 KB Output is correct
22 Correct 9 ms 348 KB Output is correct
23 Correct 6 ms 464 KB Output is correct
24 Correct 23 ms 344 KB Output is correct
25 Correct 17 ms 348 KB Output is correct
26 Correct 20 ms 504 KB Output is correct
27 Correct 22 ms 348 KB Output is correct