Submission #164316

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
164316	2019-11-19T11:14:46 Z	str0ct	Tents (JOI18_tents)	C++14	100 / 100	387 ms	59384 KB

tents

#include<bits/stdc++.h>
using namespace std;
using ll=long long;
const ll mod=1e9+7;
ll dp[3030][3030];
ll f(ll col,ll row){
    //printf("%d%d\n",col,row);
    if(col<0||row<0)return 0;
    if(col==0||row==0)return 1;
    if(dp[col][row])return dp[col][row];
    dp[col][row]+=(f(col-1,row)+4*row*f(col-1,row-1))%mod;
    dp[col][row]%=mod;
    dp[col][row]+=(row*(row-1)/2*f(col-1,row-2)+row*(col-1)*f(col-2,row-1))%mod;
    dp[col][row]%=mod;
    return dp[col][row];
}
int main(){
    ll H,W;
    scanf("%lld%lld",&H,&W);
    printf("%lld",f(H,W)-1);
}

Compilation message

tents.cpp: In function 'int main()':
tents.cpp:19:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld%lld",&H,&W);
     ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1

48.0 / 48.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	2 ms	256 KB	Output is correct
3	Correct	2 ms	504 KB	Output is correct
4	Correct	3 ms	1144 KB	Output is correct
5	Correct	2 ms	632 KB	Output is correct
6	Correct	4 ms	1400 KB	Output is correct
7	Correct	3 ms	760 KB	Output is correct
8	Correct	4 ms	1400 KB	Output is correct
9	Correct	3 ms	760 KB	Output is correct
10	Correct	5 ms	1784 KB	Output is correct
11	Correct	2 ms	376 KB	Output is correct
12	Correct	6 ms	2040 KB	Output is correct

Subtask #2

52.0 / 52.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	2 ms	256 KB	Output is correct
3	Correct	2 ms	504 KB	Output is correct
4	Correct	3 ms	1144 KB	Output is correct
5	Correct	2 ms	632 KB	Output is correct
6	Correct	4 ms	1400 KB	Output is correct
7	Correct	3 ms	760 KB	Output is correct
8	Correct	4 ms	1400 KB	Output is correct
9	Correct	3 ms	760 KB	Output is correct
10	Correct	5 ms	1784 KB	Output is correct
11	Correct	2 ms	376 KB	Output is correct
12	Correct	6 ms	2040 KB	Output is correct
13	Correct	2 ms	376 KB	Output is correct
14	Correct	13 ms	9820 KB	Output is correct
15	Correct	244 ms	47424 KB	Output is correct
16	Correct	5 ms	1656 KB	Output is correct
17	Correct	27 ms	6904 KB	Output is correct
18	Correct	58 ms	13688 KB	Output is correct
19	Correct	287 ms	53680 KB	Output is correct
20	Correct	218 ms	42232 KB	Output is correct
21	Correct	126 ms	25580 KB	Output is correct
22	Correct	141 ms	30812 KB	Output is correct
23	Correct	96 ms	26492 KB	Output is correct
24	Correct	387 ms	59384 KB	Output is correct
25	Correct	284 ms	49656 KB	Output is correct
26	Correct	325 ms	55160 KB	Output is correct
27	Correct	371 ms	57464 KB	Output is correct