답안 #320089

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
320089	2020-11-07T13:54:40 Z	keta_tsimakuridze	Tents (JOI18_tents)	C++14	100 / 100	177 ms	71268 KB

tents

#include<bits/stdc++.h>
using namespace std;
const int mod=1e9+7;
long long n,m,k,i,dp[3005][3005];
int main(){
	cin>>n>>m;
	dp[0][0]=1;
	for(k=1;k<=max(n,m);k++)
	dp[k][0]=dp[0][k]=1;
	for(k=1;k<=n;k++){	
	for(i=1;i<=m;i++){
		dp[k][i]=dp[k-1][i];
		if(i>=2) dp[k][i]+=dp[k-1][i-2]%mod*(i*(i-1))/2%mod;
		dp[k][i]+=4*i*dp[k-1][i-1]%mod;
		if(k>=2) dp[k][i]+=dp[k-2][i-1]%mod*i%mod*(k-1)%mod;
		dp[k][i]%=mod;
	//	cout<<k<<" "<<i<<" "<<dp[k][i]<<endl;
	
	} }
	cout<<(dp[n][m]-1+mod)%mod;
}

Subtask #1

48.0 / 48.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	1004 KB	Output is correct
3	Correct	1 ms	620 KB	Output is correct
4	Correct	1 ms	1132 KB	Output is correct
5	Correct	2 ms	1516 KB	Output is correct
6	Correct	2 ms	1388 KB	Output is correct
7	Correct	2 ms	1516 KB	Output is correct
8	Correct	1 ms	1516 KB	Output is correct
9	Correct	1 ms	876 KB	Output is correct
10	Correct	3 ms	1772 KB	Output is correct
11	Correct	1 ms	1516 KB	Output is correct
12	Correct	3 ms	2284 KB	Output is correct

Subtask #2

52.0 / 52.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	1004 KB	Output is correct
3	Correct	1 ms	620 KB	Output is correct
4	Correct	1 ms	1132 KB	Output is correct
5	Correct	2 ms	1516 KB	Output is correct
6	Correct	2 ms	1388 KB	Output is correct
7	Correct	2 ms	1516 KB	Output is correct
8	Correct	1 ms	1516 KB	Output is correct
9	Correct	1 ms	876 KB	Output is correct
10	Correct	3 ms	1772 KB	Output is correct
11	Correct	1 ms	1516 KB	Output is correct
12	Correct	3 ms	2284 KB	Output is correct
13	Correct	5 ms	7788 KB	Output is correct
14	Correct	6 ms	9708 KB	Output is correct
15	Correct	120 ms	55140 KB	Output is correct
16	Correct	11 ms	9600 KB	Output is correct
17	Correct	29 ms	17380 KB	Output is correct
18	Correct	34 ms	17892 KB	Output is correct
19	Correct	134 ms	62948 KB	Output is correct
20	Correct	107 ms	50916 KB	Output is correct
21	Correct	74 ms	35556 KB	Output is correct
22	Correct	72 ms	35428 KB	Output is correct
23	Correct	43 ms	27108 KB	Output is correct
24	Correct	177 ms	71268 KB	Output is correct
25	Correct	136 ms	61284 KB	Output is correct
26	Correct	156 ms	66788 KB	Output is correct
27	Correct	177 ms	69348 KB	Output is correct