#include <bits/stdc++.h>
using namespace std;
const int MAXN = 5001, INF = 1e9;
int n, a[MAXN], p[MAXN], dp[MAXN], inv[MAXN][MAXN];
signed main(){
cin.tie(0)->sync_with_stdio(0);
cin >> n;
for(int i=1; i<=n; ++i){
cin >> a[i];
p[a[i]] = i;
}
for(int j=2; j<=n; ++j){
int c = 0;
for(int i=j-1; i; --i){
c += p[i] > p[j];
inv[i][j] = inv[i][j-1] + c;
}
}
for(int i=1; i<=n; ++i){
dp[i] = INF;
for(int j=0; j<i; ++j){
dp[i] = min(dp[i], dp[j] + inv[1][i] - inv[1][j] + ((i-j)*(i-j-1))/2 - 2 * inv[j+1][i]);
}
}
cout << dp[n];
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
0 ms |
332 KB |
Output is correct |
| 4 |
Correct |
0 ms |
332 KB |
Output is correct |
| 5 |
Correct |
1 ms |
332 KB |
Output is correct |
| 6 |
Correct |
1 ms |
332 KB |
Output is correct |
| 7 |
Correct |
1 ms |
332 KB |
Output is correct |
| 8 |
Correct |
0 ms |
332 KB |
Output is correct |
| 9 |
Correct |
1 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
332 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
0 ms |
332 KB |
Output is correct |
| 4 |
Correct |
0 ms |
332 KB |
Output is correct |
| 5 |
Correct |
1 ms |
332 KB |
Output is correct |
| 6 |
Correct |
1 ms |
332 KB |
Output is correct |
| 7 |
Correct |
1 ms |
332 KB |
Output is correct |
| 8 |
Correct |
0 ms |
332 KB |
Output is correct |
| 9 |
Correct |
1 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
332 KB |
Output is correct |
| 11 |
Correct |
1 ms |
332 KB |
Output is correct |
| 12 |
Correct |
1 ms |
328 KB |
Output is correct |
| 13 |
Correct |
1 ms |
332 KB |
Output is correct |
| 14 |
Correct |
1 ms |
332 KB |
Output is correct |
| 15 |
Correct |
1 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
320 KB |
Output is correct |
| 17 |
Correct |
1 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
332 KB |
Output is correct |
| 19 |
Correct |
1 ms |
332 KB |
Output is correct |
| 20 |
Correct |
1 ms |
332 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
0 ms |
332 KB |
Output is correct |
| 4 |
Correct |
0 ms |
332 KB |
Output is correct |
| 5 |
Correct |
1 ms |
332 KB |
Output is correct |
| 6 |
Correct |
1 ms |
332 KB |
Output is correct |
| 7 |
Correct |
1 ms |
332 KB |
Output is correct |
| 8 |
Correct |
0 ms |
332 KB |
Output is correct |
| 9 |
Correct |
1 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
332 KB |
Output is correct |
| 11 |
Correct |
1 ms |
332 KB |
Output is correct |
| 12 |
Correct |
1 ms |
328 KB |
Output is correct |
| 13 |
Correct |
1 ms |
332 KB |
Output is correct |
| 14 |
Correct |
1 ms |
332 KB |
Output is correct |
| 15 |
Correct |
1 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
320 KB |
Output is correct |
| 17 |
Correct |
1 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
332 KB |
Output is correct |
| 19 |
Correct |
1 ms |
332 KB |
Output is correct |
| 20 |
Correct |
1 ms |
332 KB |
Output is correct |
| 21 |
Correct |
1 ms |
1092 KB |
Output is correct |
| 22 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 24 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 25 |
Correct |
1 ms |
1228 KB |
Output is correct |
| 26 |
Correct |
1 ms |
1224 KB |
Output is correct |
| 27 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 28 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 29 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 30 |
Correct |
1 ms |
1100 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
0 ms |
332 KB |
Output is correct |
| 4 |
Correct |
0 ms |
332 KB |
Output is correct |
| 5 |
Correct |
1 ms |
332 KB |
Output is correct |
| 6 |
Correct |
1 ms |
332 KB |
Output is correct |
| 7 |
Correct |
1 ms |
332 KB |
Output is correct |
| 8 |
Correct |
0 ms |
332 KB |
Output is correct |
| 9 |
Correct |
1 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
332 KB |
Output is correct |
| 11 |
Correct |
1 ms |
332 KB |
Output is correct |
| 12 |
Correct |
1 ms |
328 KB |
Output is correct |
| 13 |
Correct |
1 ms |
332 KB |
Output is correct |
| 14 |
Correct |
1 ms |
332 KB |
Output is correct |
| 15 |
Correct |
1 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
320 KB |
Output is correct |
| 17 |
Correct |
1 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
332 KB |
Output is correct |
| 19 |
Correct |
1 ms |
332 KB |
Output is correct |
| 20 |
Correct |
1 ms |
332 KB |
Output is correct |
| 21 |
Correct |
1 ms |
1092 KB |
Output is correct |
| 22 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 24 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 25 |
Correct |
1 ms |
1228 KB |
Output is correct |
| 26 |
Correct |
1 ms |
1224 KB |
Output is correct |
| 27 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 28 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 29 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 30 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 31 |
Correct |
5 ms |
4808 KB |
Output is correct |
| 32 |
Correct |
5 ms |
4812 KB |
Output is correct |
| 33 |
Correct |
5 ms |
4812 KB |
Output is correct |
| 34 |
Correct |
6 ms |
4812 KB |
Output is correct |
| 35 |
Correct |
5 ms |
4812 KB |
Output is correct |
| 36 |
Correct |
5 ms |
4812 KB |
Output is correct |
| 37 |
Correct |
5 ms |
4812 KB |
Output is correct |
| 38 |
Correct |
5 ms |
4812 KB |
Output is correct |
| 39 |
Correct |
5 ms |
4812 KB |
Output is correct |
| 40 |
Correct |
5 ms |
4812 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
0 ms |
332 KB |
Output is correct |
| 4 |
Correct |
0 ms |
332 KB |
Output is correct |
| 5 |
Correct |
1 ms |
332 KB |
Output is correct |
| 6 |
Correct |
1 ms |
332 KB |
Output is correct |
| 7 |
Correct |
1 ms |
332 KB |
Output is correct |
| 8 |
Correct |
0 ms |
332 KB |
Output is correct |
| 9 |
Correct |
1 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
332 KB |
Output is correct |
| 11 |
Correct |
1 ms |
332 KB |
Output is correct |
| 12 |
Correct |
1 ms |
328 KB |
Output is correct |
| 13 |
Correct |
1 ms |
332 KB |
Output is correct |
| 14 |
Correct |
1 ms |
332 KB |
Output is correct |
| 15 |
Correct |
1 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
320 KB |
Output is correct |
| 17 |
Correct |
1 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
332 KB |
Output is correct |
| 19 |
Correct |
1 ms |
332 KB |
Output is correct |
| 20 |
Correct |
1 ms |
332 KB |
Output is correct |
| 21 |
Correct |
1 ms |
1092 KB |
Output is correct |
| 22 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 24 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 25 |
Correct |
1 ms |
1228 KB |
Output is correct |
| 26 |
Correct |
1 ms |
1224 KB |
Output is correct |
| 27 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 28 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 29 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 30 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 31 |
Correct |
5 ms |
4808 KB |
Output is correct |
| 32 |
Correct |
5 ms |
4812 KB |
Output is correct |
| 33 |
Correct |
5 ms |
4812 KB |
Output is correct |
| 34 |
Correct |
6 ms |
4812 KB |
Output is correct |
| 35 |
Correct |
5 ms |
4812 KB |
Output is correct |
| 36 |
Correct |
5 ms |
4812 KB |
Output is correct |
| 37 |
Correct |
5 ms |
4812 KB |
Output is correct |
| 38 |
Correct |
5 ms |
4812 KB |
Output is correct |
| 39 |
Correct |
5 ms |
4812 KB |
Output is correct |
| 40 |
Correct |
5 ms |
4812 KB |
Output is correct |
| 41 |
Correct |
294 ms |
67296 KB |
Output is correct |
| 42 |
Correct |
287 ms |
67292 KB |
Output is correct |
| 43 |
Correct |
299 ms |
67320 KB |
Output is correct |
| 44 |
Correct |
297 ms |
67268 KB |
Output is correct |
| 45 |
Correct |
300 ms |
67320 KB |
Output is correct |
| 46 |
Correct |
296 ms |
67224 KB |
Output is correct |
| 47 |
Correct |
297 ms |
67224 KB |
Output is correct |
| 48 |
Correct |
295 ms |
67268 KB |
Output is correct |
| 49 |
Correct |
295 ms |
67344 KB |
Output is correct |
| 50 |
Correct |
296 ms |
67264 KB |
Output is correct |
| 51 |
Correct |
299 ms |
67340 KB |
Output is correct |
| 52 |
Correct |
303 ms |
67344 KB |
Output is correct |
| 53 |
Correct |
295 ms |
67520 KB |
Output is correct |
| 54 |
Correct |
292 ms |
67268 KB |
Output is correct |
| 55 |
Correct |
288 ms |
67348 KB |
Output is correct |
