| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 60066 |
2018-07-23T15:16:08 Z |
XmtosX |
Tents (JOI18_tents) |
C++17 |
|
425 ms |
59308 KB |
#include <bits/stdc++.h>
using namespace std;
long long dp1(long long x,long long rem);
const int N=3003,mod=1e9+7;
int n,m;
long long memo[N][N],memo1[N][N];
long long dp (long long x,long long rem)
{
if (x==m)
{
return (rem!=n);
}
long long &ret= memo[x][rem];
if (ret)
return ret;
ret= dp(x+1,rem);
if (rem>=2)
{
ret+= dp(x+1,rem-2)*(rem*(rem-1)/2);
ret%=mod;
}
if (rem>=1)
{
ret+= dp(x+1,rem-1)*rem*4;
ret%=mod;
if (x+2<=m)
{
ret+= (dp(x+2,rem-1)*rem*(m-x-1));
ret%=mod;
}
}
return ret;
}
int main()
{
cin >>n>>m;
cout <<dp(0,n);
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
4 ms |
1256 KB |
Output is correct |
| 3 |
Correct |
2 ms |
1256 KB |
Output is correct |
| 4 |
Correct |
3 ms |
1256 KB |
Output is correct |
| 5 |
Correct |
6 ms |
1600 KB |
Output is correct |
| 6 |
Correct |
3 ms |
1600 KB |
Output is correct |
| 7 |
Correct |
5 ms |
1600 KB |
Output is correct |
| 8 |
Correct |
3 ms |
1600 KB |
Output is correct |
| 9 |
Correct |
3 ms |
1600 KB |
Output is correct |
| 10 |
Correct |
3 ms |
1600 KB |
Output is correct |
| 11 |
Correct |
4 ms |
1772 KB |
Output is correct |
| 12 |
Correct |
7 ms |
2288 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
4 ms |
1256 KB |
Output is correct |
| 3 |
Correct |
2 ms |
1256 KB |
Output is correct |
| 4 |
Correct |
3 ms |
1256 KB |
Output is correct |
| 5 |
Correct |
6 ms |
1600 KB |
Output is correct |
| 6 |
Correct |
3 ms |
1600 KB |
Output is correct |
| 7 |
Correct |
5 ms |
1600 KB |
Output is correct |
| 8 |
Correct |
3 ms |
1600 KB |
Output is correct |
| 9 |
Correct |
3 ms |
1600 KB |
Output is correct |
| 10 |
Correct |
3 ms |
1600 KB |
Output is correct |
| 11 |
Correct |
4 ms |
1772 KB |
Output is correct |
| 12 |
Correct |
7 ms |
2288 KB |
Output is correct |
| 13 |
Correct |
12 ms |
8180 KB |
Output is correct |
| 14 |
Correct |
2 ms |
8180 KB |
Output is correct |
| 15 |
Correct |
258 ms |
36120 KB |
Output is correct |
| 16 |
Correct |
30 ms |
36120 KB |
Output is correct |
| 17 |
Correct |
66 ms |
36120 KB |
Output is correct |
| 18 |
Correct |
81 ms |
36120 KB |
Output is correct |
| 19 |
Correct |
357 ms |
41392 KB |
Output is correct |
| 20 |
Correct |
256 ms |
41392 KB |
Output is correct |
| 21 |
Correct |
222 ms |
41392 KB |
Output is correct |
| 22 |
Correct |
145 ms |
41392 KB |
Output is correct |
| 23 |
Correct |
35 ms |
41392 KB |
Output is correct |
| 24 |
Correct |
425 ms |
59308 KB |
Output is correct |
| 25 |
Correct |
359 ms |
59308 KB |
Output is correct |
| 26 |
Correct |
361 ms |
59308 KB |
Output is correct |
| 27 |
Correct |
424 ms |
59308 KB |
Output is correct |
