Submission #56307

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
56307	2018-07-11T03:56:30 Z	khsoo01(#2109)	Tents (JOI18_tents)	C++11	100 / 100	127 ms	71348 KB

tents

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;

const ll N = 3005, mod = 1e9+7;

ll h, w, dt[N][N];

int main()
{
	scanf("%lld%lld",&h,&w);
	for(ll i=0;i<=w;i++) dt[0][i] = 1;
	for(ll i=1;i<=h;i++) {
		dt[i][0] = 1;
		for(ll j=1;j<=w;j++) {
			dt[i][j] = (dt[i-1][j] + dt[i-1][j-1] * 4 * j) % mod;
			if(i >= 2) dt[i][j] = (dt[i][j] + dt[i-2][j-1] * j * (i-1)) % mod;
			if(j >= 2) dt[i][j] = (dt[i][j] + dt[i-1][j-2] * j * (j-1) / 2) % mod;
		}
	}
	printf("%lld\n",(dt[h][w]+mod-1)%mod);
}

Compilation message

tents.cpp: In function 'int main()':
tents.cpp:11:7: 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	3 ms	376 KB	Output is correct
2	Correct	3 ms	496 KB	Output is correct
3	Correct	2 ms	548 KB	Output is correct
4	Correct	3 ms	1368 KB	Output is correct
5	Correct	6 ms	1368 KB	Output is correct
6	Correct	5 ms	1736 KB	Output is correct
7	Correct	3 ms	1736 KB	Output is correct
8	Correct	4 ms	1852 KB	Output is correct
9	Correct	3 ms	1852 KB	Output is correct
10	Correct	5 ms	2160 KB	Output is correct
11	Correct	3 ms	2160 KB	Output is correct
12	Correct	5 ms	2680 KB	Output is correct

Subtask #2

52.0 / 52.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	376 KB	Output is correct
2	Correct	3 ms	496 KB	Output is correct
3	Correct	2 ms	548 KB	Output is correct
4	Correct	3 ms	1368 KB	Output is correct
5	Correct	6 ms	1368 KB	Output is correct
6	Correct	5 ms	1736 KB	Output is correct
7	Correct	3 ms	1736 KB	Output is correct
8	Correct	4 ms	1852 KB	Output is correct
9	Correct	3 ms	1852 KB	Output is correct
10	Correct	5 ms	2160 KB	Output is correct
11	Correct	3 ms	2160 KB	Output is correct
12	Correct	5 ms	2680 KB	Output is correct
13	Correct	2 ms	2680 KB	Output is correct
14	Correct	11 ms	10112 KB	Output is correct
15	Correct	102 ms	55680 KB	Output is correct
16	Correct	12 ms	55680 KB	Output is correct
17	Correct	22 ms	55680 KB	Output is correct
18	Correct	31 ms	55680 KB	Output is correct
19	Correct	105 ms	63440 KB	Output is correct
20	Correct	95 ms	63440 KB	Output is correct
21	Correct	63 ms	63440 KB	Output is correct
22	Correct	63 ms	63440 KB	Output is correct
23	Correct	35 ms	63440 KB	Output is correct
24	Correct	127 ms	71348 KB	Output is correct
25	Correct	103 ms	71348 KB	Output is correct
26	Correct	108 ms	71348 KB	Output is correct
27	Correct	123 ms	71348 KB	Output is correct