| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 60089 |
2018-07-23T16:04:00 Z |
Hassoony |
Tents (JOI18_tents) |
C++17 |
|
559 ms |
71804 KB |
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int MX=3009;
const ll mod=1e9+7;
ll n,m,dp[MX][MX];
ll DP(ll x,ll rem){
if(x>n)return 0;
if(rem==0)return 1ll;
if(rem<0)return 0;
if(x==n)return (rem!=m)*1ll;
ll &ret=dp[x][rem];if(ret!=-1)return ret;
ret=DP(x+1,rem)%mod;
ret=(ret+(DP(x+1,rem-1)*4*rem)%mod)%mod;
ret=(ret+(DP(x+1,rem-2)*(rem*(rem-1)/2))%mod)%mod;
ret=(ret+(DP(x+2,rem-1)*rem*(n-x-1))%mod)%mod;
return ret;
}
int main(){
cin>>n>>m;
memset(dp,-1,sizeof(dp));
cout<<DP(0,m)<<endl;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
65 ms |
71160 KB |
Output is correct |
| 2 |
Correct |
68 ms |
71276 KB |
Output is correct |
| 3 |
Correct |
62 ms |
71320 KB |
Output is correct |
| 4 |
Correct |
65 ms |
71392 KB |
Output is correct |
| 5 |
Correct |
58 ms |
71392 KB |
Output is correct |
| 6 |
Correct |
62 ms |
71392 KB |
Output is correct |
| 7 |
Correct |
66 ms |
71392 KB |
Output is correct |
| 8 |
Correct |
62 ms |
71480 KB |
Output is correct |
| 9 |
Correct |
64 ms |
71480 KB |
Output is correct |
| 10 |
Correct |
65 ms |
71516 KB |
Output is correct |
| 11 |
Correct |
57 ms |
71516 KB |
Output is correct |
| 12 |
Correct |
67 ms |
71516 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
65 ms |
71160 KB |
Output is correct |
| 2 |
Correct |
68 ms |
71276 KB |
Output is correct |
| 3 |
Correct |
62 ms |
71320 KB |
Output is correct |
| 4 |
Correct |
65 ms |
71392 KB |
Output is correct |
| 5 |
Correct |
58 ms |
71392 KB |
Output is correct |
| 6 |
Correct |
62 ms |
71392 KB |
Output is correct |
| 7 |
Correct |
66 ms |
71392 KB |
Output is correct |
| 8 |
Correct |
62 ms |
71480 KB |
Output is correct |
| 9 |
Correct |
64 ms |
71480 KB |
Output is correct |
| 10 |
Correct |
65 ms |
71516 KB |
Output is correct |
| 11 |
Correct |
57 ms |
71516 KB |
Output is correct |
| 12 |
Correct |
67 ms |
71516 KB |
Output is correct |
| 13 |
Correct |
73 ms |
71516 KB |
Output is correct |
| 14 |
Correct |
70 ms |
71516 KB |
Output is correct |
| 15 |
Correct |
357 ms |
71708 KB |
Output is correct |
| 16 |
Correct |
60 ms |
71708 KB |
Output is correct |
| 17 |
Correct |
84 ms |
71708 KB |
Output is correct |
| 18 |
Correct |
137 ms |
71708 KB |
Output is correct |
| 19 |
Correct |
336 ms |
71708 KB |
Output is correct |
| 20 |
Correct |
282 ms |
71708 KB |
Output is correct |
| 21 |
Correct |
175 ms |
71708 KB |
Output is correct |
| 22 |
Correct |
192 ms |
71708 KB |
Output is correct |
| 23 |
Correct |
167 ms |
71804 KB |
Output is correct |
| 24 |
Correct |
520 ms |
71804 KB |
Output is correct |
| 25 |
Correct |
338 ms |
71804 KB |
Output is correct |
| 26 |
Correct |
434 ms |
71804 KB |
Output is correct |
| 27 |
Correct |
559 ms |
71804 KB |
Output is correct |
