| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 386973 |
2021-04-07T17:51:23 Z |
wind_reaper |
Tents (JOI18_tents) |
C++17 |
|
517 ms |
71276 KB |
#include <bits/stdc++.h>
using namespace std;
const int64_t mod = 1000000007;
int64_t dp[3001][3001];
int64_t f(int64_t row, int64_t col){
if(row < 0 || col < 0)
return 0;
if(row == 0 || col == 0) return 1;
if(dp[row][col] != -1)
return dp[row][col];
int64_t val = f(row, col-1);
(val += row*4*f(row-1, col-1)) %= mod;
(val += row*(col-1)*f(row-1, col-2)) %= mod;
(val += row*(row-1)/2*f(row-2, col-1)) %= mod;
return dp[row][col] = val;
}
int32_t main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int h, w;
cin >> h >> w;
memset(dp, -1, sizeof dp);
cout << (f(h, w) - 1 + mod) % mod << '\n';
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
39 ms |
70892 KB |
Output is correct |
| 2 |
Correct |
39 ms |
70892 KB |
Output is correct |
| 3 |
Correct |
39 ms |
70912 KB |
Output is correct |
| 4 |
Correct |
38 ms |
70892 KB |
Output is correct |
| 5 |
Correct |
38 ms |
70892 KB |
Output is correct |
| 6 |
Correct |
39 ms |
70892 KB |
Output is correct |
| 7 |
Correct |
39 ms |
70892 KB |
Output is correct |
| 8 |
Correct |
39 ms |
70892 KB |
Output is correct |
| 9 |
Correct |
39 ms |
70892 KB |
Output is correct |
| 10 |
Correct |
39 ms |
70892 KB |
Output is correct |
| 11 |
Correct |
38 ms |
70892 KB |
Output is correct |
| 12 |
Correct |
40 ms |
70892 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
39 ms |
70892 KB |
Output is correct |
| 2 |
Correct |
39 ms |
70892 KB |
Output is correct |
| 3 |
Correct |
39 ms |
70912 KB |
Output is correct |
| 4 |
Correct |
38 ms |
70892 KB |
Output is correct |
| 5 |
Correct |
38 ms |
70892 KB |
Output is correct |
| 6 |
Correct |
39 ms |
70892 KB |
Output is correct |
| 7 |
Correct |
39 ms |
70892 KB |
Output is correct |
| 8 |
Correct |
39 ms |
70892 KB |
Output is correct |
| 9 |
Correct |
39 ms |
70892 KB |
Output is correct |
| 10 |
Correct |
39 ms |
70892 KB |
Output is correct |
| 11 |
Correct |
38 ms |
70892 KB |
Output is correct |
| 12 |
Correct |
40 ms |
70892 KB |
Output is correct |
| 13 |
Correct |
39 ms |
71020 KB |
Output is correct |
| 14 |
Correct |
39 ms |
70800 KB |
Output is correct |
| 15 |
Correct |
302 ms |
71020 KB |
Output is correct |
| 16 |
Correct |
50 ms |
71020 KB |
Output is correct |
| 17 |
Correct |
82 ms |
71020 KB |
Output is correct |
| 18 |
Correct |
91 ms |
71020 KB |
Output is correct |
| 19 |
Correct |
349 ms |
71148 KB |
Output is correct |
| 20 |
Correct |
291 ms |
71020 KB |
Output is correct |
| 21 |
Correct |
213 ms |
71276 KB |
Output is correct |
| 22 |
Correct |
178 ms |
71020 KB |
Output is correct |
| 23 |
Correct |
54 ms |
70892 KB |
Output is correct |
| 24 |
Correct |
517 ms |
71276 KB |
Output is correct |
| 25 |
Correct |
394 ms |
71020 KB |
Output is correct |
| 26 |
Correct |
448 ms |
71148 KB |
Output is correct |
| 27 |
Correct |
508 ms |
71276 KB |
Output is correct |
