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답안 #228045

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
228045 2020-04-29T16:48:54 Z bharat2002 Tents (JOI18_tents) C++14
100 / 100
 313 ms 71672 KB 
/*input
1 2
*/
#include<bits/stdc++.h>
using namespace std;
const int N=3011;
const int mod=1e9+7;
#define int long long
const int inf=1e18;
#define pii pair<int, int>
#define f first
#define s second 
#define mp make_pair
#define FOR(i, n) for(int i=1;i<=n;i++)
#define TRACE(x) cerr << #x << " = " << x << endl 
//Trace prints the name of the variable and the value.
int dp[N][N];
int solve(int r, int c)
{
	if(r<0||c<0) return 0;
	if(r==0||c==0) return 1;
	if(dp[r][c]!=-1) return dp[r][c];
	int temp=solve(r, c-1);
	temp+=(((r*(r-1))/2)*solve(r-2, c-1))%mod;temp%=mod;
	temp+=(4*r*solve(r-1, c-1))%mod;temp%=mod;
	temp+=((c-1)*r*solve(r-1, c-2));temp%=mod;
	dp[r][c]=temp;return dp[r][c];
}
signed main()
{
	ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
	int r, c;cin>>r>>c;
	for(int i=0;i<N;i++)
		for(int j=0;j<N;j++) dp[i][j]=-1;
	cout<<(solve(r, c)+mod-1)%mod;
}

Subtask #1
48.0 / 48.0

# 결과 실행 시간 메모리 Grader output
1 Correct 36 ms 71296 KB Output is correct
2 Correct 35 ms 71296 KB Output is correct
3 Correct 35 ms 71296 KB Output is correct
4 Correct 35 ms 71296 KB Output is correct
5 Correct 35 ms 71296 KB Output is correct
6 Correct 37 ms 71288 KB Output is correct
7 Correct 35 ms 71296 KB Output is correct
8 Correct 34 ms 71288 KB Output is correct
9 Correct 34 ms 71296 KB Output is correct
10 Correct 35 ms 71288 KB Output is correct
11 Correct 36 ms 71292 KB Output is correct
12 Correct 36 ms 71296 KB Output is correct

Subtask #2
52.0 / 52.0

# 결과 실행 시간 메모리 Grader output
1 Correct 36 ms 71296 KB Output is correct
2 Correct 35 ms 71296 KB Output is correct
3 Correct 35 ms 71296 KB Output is correct
4 Correct 35 ms 71296 KB Output is correct
5 Correct 35 ms 71296 KB Output is correct
6 Correct 37 ms 71288 KB Output is correct
7 Correct 35 ms 71296 KB Output is correct
8 Correct 34 ms 71288 KB Output is correct
9 Correct 34 ms 71296 KB Output is correct
10 Correct 35 ms 71288 KB Output is correct
11 Correct 36 ms 71292 KB Output is correct
12 Correct 36 ms 71296 KB Output is correct
13 Correct 36 ms 71424 KB Output is correct
14 Correct 35 ms 71296 KB Output is correct
15 Correct 192 ms 71424 KB Output is correct
16 Correct 60 ms 71416 KB Output is correct
17 Correct 67 ms 71424 KB Output is correct
18 Correct 86 ms 71552 KB Output is correct
19 Correct 220 ms 71416 KB Output is correct
20 Correct 188 ms 71548 KB Output is correct
21 Correct 137 ms 71416 KB Output is correct
22 Correct 134 ms 71416 KB Output is correct
23 Correct 51 ms 71416 KB Output is correct
24 Correct 295 ms 71544 KB Output is correct
25 Correct 233 ms 71672 KB Output is correct
26 Correct 261 ms 71552 KB Output is correct
27 Correct 313 ms 71552 KB Output is correct