| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 235253 |
2020-05-27T14:12:29 Z |
wwdd |
Tents (JOI18_tents) |
C++14 |
|
319 ms |
72568 KB |
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int MN = 3030;
const ll M = 1e9+7;
ll mul(ll a, ll b) {return (a*b)%M;}
ll dp[MN][MN];
ll ds(int h, int w) {
if(h == 0 || w == 0) {return 1;}
if(h < 0 || w < 0) {return 0;}
if(dp[h][w] != -1) {
return dp[h][w];
}
ll res = ds(h-1,w)+mul(4*w,ds(h-1,w-1));
if(h > 1) {
res += mul(w*(h-1),ds(h-2,w-1));
}
if(w > 1) {
res += mul(w*(w-1)/2,ds(h-1,w-2));
}
res %= M;
return dp[h][w] = res;
}
int main() {
ll h,w;
cin >> h >> w;
memset(dp,-1,sizeof(dp));
ll res = ds(h,w);
res--;
res = ((res%M)+M)%M;
cout << res << '\n';
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
39 ms |
72192 KB |
Output is correct |
| 2 |
Correct |
38 ms |
72188 KB |
Output is correct |
| 3 |
Correct |
40 ms |
72184 KB |
Output is correct |
| 4 |
Correct |
40 ms |
72184 KB |
Output is correct |
| 5 |
Correct |
41 ms |
72184 KB |
Output is correct |
| 6 |
Correct |
40 ms |
72188 KB |
Output is correct |
| 7 |
Correct |
41 ms |
72184 KB |
Output is correct |
| 8 |
Correct |
40 ms |
72184 KB |
Output is correct |
| 9 |
Correct |
41 ms |
72192 KB |
Output is correct |
| 10 |
Correct |
42 ms |
72184 KB |
Output is correct |
| 11 |
Correct |
40 ms |
72244 KB |
Output is correct |
| 12 |
Correct |
42 ms |
72192 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
39 ms |
72192 KB |
Output is correct |
| 2 |
Correct |
38 ms |
72188 KB |
Output is correct |
| 3 |
Correct |
40 ms |
72184 KB |
Output is correct |
| 4 |
Correct |
40 ms |
72184 KB |
Output is correct |
| 5 |
Correct |
41 ms |
72184 KB |
Output is correct |
| 6 |
Correct |
40 ms |
72188 KB |
Output is correct |
| 7 |
Correct |
41 ms |
72184 KB |
Output is correct |
| 8 |
Correct |
40 ms |
72184 KB |
Output is correct |
| 9 |
Correct |
41 ms |
72192 KB |
Output is correct |
| 10 |
Correct |
42 ms |
72184 KB |
Output is correct |
| 11 |
Correct |
40 ms |
72244 KB |
Output is correct |
| 12 |
Correct |
42 ms |
72192 KB |
Output is correct |
| 13 |
Correct |
40 ms |
72192 KB |
Output is correct |
| 14 |
Correct |
40 ms |
72312 KB |
Output is correct |
| 15 |
Correct |
195 ms |
72440 KB |
Output is correct |
| 16 |
Correct |
41 ms |
72192 KB |
Output is correct |
| 17 |
Correct |
54 ms |
72188 KB |
Output is correct |
| 18 |
Correct |
72 ms |
72312 KB |
Output is correct |
| 19 |
Correct |
221 ms |
72440 KB |
Output is correct |
| 20 |
Correct |
181 ms |
72440 KB |
Output is correct |
| 21 |
Correct |
119 ms |
72320 KB |
Output is correct |
| 22 |
Correct |
131 ms |
72392 KB |
Output is correct |
| 23 |
Correct |
101 ms |
72440 KB |
Output is correct |
| 24 |
Correct |
319 ms |
72440 KB |
Output is correct |
| 25 |
Correct |
210 ms |
72444 KB |
Output is correct |
| 26 |
Correct |
247 ms |
72440 KB |
Output is correct |
| 27 |
Correct |
291 ms |
72568 KB |
Output is correct |
