| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 318339 |
2020-11-01T10:12:05 Z |
HPC |
Kangaroo (CEOI16_kangaroo) |
C++17 |
|
28 ms |
31724 KB |
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int MAXN=2e3+5;
const ll MOD = 1e9+7;
int N, S, T;
ll dp[MAXN][MAXN];
int main(){
cin >> N >> S >> T;
if(S > T){
swap(S,T);
}
if(N == 1){
cout << "1\n";
return 0;
}
dp[0][0] = 1;
for(int i=1;i<=N;i++){
for(int j=1;j<=N;j++){
if(i == S || i == T){
dp[i][j] = dp[i-1][j]+dp[i-1][j-1];
}else if(i > T){
dp[i][j] = (j-2)*dp[i-1][j-1]+j*dp[i-1][j+1];
}else if(i > S){
dp[i][j] = (j-1)*dp[i-1][j-1]+j*dp[i-1][j+1];
}else{
dp[i][j] = j*dp[i-1][j-1]+j*dp[i-1][j+1];
}/*
dp[i][j][0] = j*dp[i-1][j-1][0]+j*dp[i-1][j+1][0];
dp[i][j][1] = (j-1)*dp[i-1][j-1][1]+j*dp[i-1][j+1][1]+2*dp[i-1][j][0]+2*dp[i-1][j-1][0];
dp[i][j][2] = (j-2)*dp[i-1][j-1][2]+j*dp[i-1][j+1][2]+dp[i-1][j][1]+dp[i-1][j-1][1];*/
dp[i][j] %= MOD;
}
}
cout << dp[N][1] << '\n';
return 0;
}
/*
https://oj.uz/problem/view/CEOI16_kangaroo
A[i]>A[i-1]
2 1 5 3 4
(N-2)!
*/
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
364 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
364 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
492 KB |
Output is correct |
| 4 |
Correct |
1 ms |
492 KB |
Output is correct |
| 5 |
Correct |
1 ms |
492 KB |
Output is correct |
| 6 |
Correct |
1 ms |
492 KB |
Output is correct |
| 7 |
Correct |
1 ms |
492 KB |
Output is correct |
| 8 |
Correct |
1 ms |
492 KB |
Output is correct |
| 9 |
Correct |
1 ms |
492 KB |
Output is correct |
| 10 |
Correct |
1 ms |
492 KB |
Output is correct |
| 11 |
Correct |
1 ms |
512 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
364 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
492 KB |
Output is correct |
| 4 |
Correct |
1 ms |
492 KB |
Output is correct |
| 5 |
Correct |
1 ms |
492 KB |
Output is correct |
| 6 |
Correct |
1 ms |
492 KB |
Output is correct |
| 7 |
Correct |
1 ms |
492 KB |
Output is correct |
| 8 |
Correct |
1 ms |
492 KB |
Output is correct |
| 9 |
Correct |
1 ms |
492 KB |
Output is correct |
| 10 |
Correct |
1 ms |
492 KB |
Output is correct |
| 11 |
Correct |
1 ms |
512 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1516 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1388 KB |
Output is correct |
| 14 |
Correct |
1 ms |
1388 KB |
Output is correct |
| 15 |
Correct |
1 ms |
1516 KB |
Output is correct |
| 16 |
Correct |
1 ms |
1388 KB |
Output is correct |
| 17 |
Correct |
1 ms |
1516 KB |
Output is correct |
| 18 |
Correct |
1 ms |
1260 KB |
Output is correct |
| 19 |
Correct |
1 ms |
1388 KB |
Output is correct |
| 20 |
Correct |
1 ms |
1516 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
364 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
492 KB |
Output is correct |
| 4 |
Correct |
1 ms |
492 KB |
Output is correct |
| 5 |
Correct |
1 ms |
492 KB |
Output is correct |
| 6 |
Correct |
1 ms |
492 KB |
Output is correct |
| 7 |
Correct |
1 ms |
492 KB |
Output is correct |
| 8 |
Correct |
1 ms |
492 KB |
Output is correct |
| 9 |
Correct |
1 ms |
492 KB |
Output is correct |
| 10 |
Correct |
1 ms |
492 KB |
Output is correct |
| 11 |
Correct |
1 ms |
512 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1516 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1388 KB |
Output is correct |
| 14 |
Correct |
1 ms |
1388 KB |
Output is correct |
| 15 |
Correct |
1 ms |
1516 KB |
Output is correct |
| 16 |
Correct |
1 ms |
1388 KB |
Output is correct |
| 17 |
Correct |
1 ms |
1516 KB |
Output is correct |
| 18 |
Correct |
1 ms |
1260 KB |
Output is correct |
| 19 |
Correct |
1 ms |
1388 KB |
Output is correct |
| 20 |
Correct |
1 ms |
1516 KB |
Output is correct |
| 21 |
Correct |
5 ms |
6380 KB |
Output is correct |
| 22 |
Correct |
5 ms |
7148 KB |
Output is correct |
| 23 |
Correct |
6 ms |
7788 KB |
Output is correct |
| 24 |
Correct |
27 ms |
31724 KB |
Output is correct |
| 25 |
Correct |
27 ms |
31724 KB |
Output is correct |
| 26 |
Correct |
28 ms |
31716 KB |
Output is correct |
| 27 |
Correct |
27 ms |
31588 KB |
Output is correct |
| 28 |
Correct |
19 ms |
23788 KB |
Output is correct |
