#include <bits/stdc++.h>
using namespace std;
const int N = 5003;
int f[N];
int cst[N][N];
int dp[N];
int lsb(int i){
return i&-i;
}
void upd(int ind, int val){
for(int i=ind; i<N; i+=lsb(i))f[i]+=val;
}
int get(int l){
int ret=0;
for(int i=l; i>0; i-=lsb(i))ret+=f[i];
return ret;
}
int get(int l, int r){
return get(r)-get(l-1);
}
void calccost(int a[], int n){
for(int i=1; i<=n; i++){
int sz=n-i+1;
int pos[n+1];
int b[sz];
int skip=0;
for(int j=0; j< n; j++){
if(a[j]<i)skip++;
else b[j-skip]=a[j];
pos[a[j]]=j-skip+1;
}
int numinv=0;
int sumpos=0;
for(int j=i; j<=n; j++){
upd(pos[j], 1);
numinv+=get(0, pos[j]-1);
sumpos+=pos[j];
sumpos-=j-i+1;
cst[i][j]=numinv+sumpos;
}
for(int j=0; j<N; j++){
f[j]=0;
}
}
}
int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
int n;
cin >> n;
int a[n];
for(int i=0; i< n; i++)cin >> a[i];
calccost(a, n);
for(int i=1; i<=n; i++){
dp[i]=1e9;
for(int j=i-1; j>=0; j--){
dp[i]=min(dp[i], dp[j]+cst[j+1][i]);
}
}
cout << dp[n] << '\n';
}
Compilation message
Main.cpp: In function 'void calccost(int*, int)':
Main.cpp:32:13: warning: variable 'b' set but not used [-Wunused-but-set-variable]
32 | int b[sz];
| ^
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
344 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
604 KB |
Output is correct |
| 7 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 8 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 9 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 10 |
Correct |
1 ms |
2396 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
344 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
604 KB |
Output is correct |
| 7 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 8 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 9 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 10 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 11 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 14 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 15 |
Correct |
0 ms |
2508 KB |
Output is correct |
| 16 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 17 |
Correct |
1 ms |
2488 KB |
Output is correct |
| 18 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 19 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 20 |
Correct |
0 ms |
2396 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
344 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
604 KB |
Output is correct |
| 7 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 8 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 9 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 10 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 11 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 14 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 15 |
Correct |
0 ms |
2508 KB |
Output is correct |
| 16 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 17 |
Correct |
1 ms |
2488 KB |
Output is correct |
| 18 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 19 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 20 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 21 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 22 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 23 |
Correct |
2 ms |
4444 KB |
Output is correct |
| 24 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 25 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 26 |
Correct |
1 ms |
4440 KB |
Output is correct |
| 27 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 28 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 29 |
Correct |
1 ms |
4440 KB |
Output is correct |
| 30 |
Correct |
2 ms |
4564 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
344 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
604 KB |
Output is correct |
| 7 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 8 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 9 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 10 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 11 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 14 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 15 |
Correct |
0 ms |
2508 KB |
Output is correct |
| 16 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 17 |
Correct |
1 ms |
2488 KB |
Output is correct |
| 18 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 19 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 20 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 21 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 22 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 23 |
Correct |
2 ms |
4444 KB |
Output is correct |
| 24 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 25 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 26 |
Correct |
1 ms |
4440 KB |
Output is correct |
| 27 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 28 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 29 |
Correct |
1 ms |
4440 KB |
Output is correct |
| 30 |
Correct |
2 ms |
4564 KB |
Output is correct |
| 31 |
Correct |
10 ms |
16732 KB |
Output is correct |
| 32 |
Correct |
10 ms |
16884 KB |
Output is correct |
| 33 |
Correct |
9 ms |
16848 KB |
Output is correct |
| 34 |
Correct |
10 ms |
16732 KB |
Output is correct |
| 35 |
Correct |
9 ms |
16940 KB |
Output is correct |
| 36 |
Correct |
10 ms |
16732 KB |
Output is correct |
| 37 |
Correct |
9 ms |
16732 KB |
Output is correct |
| 38 |
Correct |
9 ms |
16732 KB |
Output is correct |
| 39 |
Correct |
10 ms |
16944 KB |
Output is correct |
| 40 |
Correct |
9 ms |
16732 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
344 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
604 KB |
Output is correct |
| 7 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 8 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 9 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 10 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 11 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 14 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 15 |
Correct |
0 ms |
2508 KB |
Output is correct |
| 16 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 17 |
Correct |
1 ms |
2488 KB |
Output is correct |
| 18 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 19 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 20 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 21 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 22 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 23 |
Correct |
2 ms |
4444 KB |
Output is correct |
| 24 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 25 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 26 |
Correct |
1 ms |
4440 KB |
Output is correct |
| 27 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 28 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 29 |
Correct |
1 ms |
4440 KB |
Output is correct |
| 30 |
Correct |
2 ms |
4564 KB |
Output is correct |
| 31 |
Correct |
10 ms |
16732 KB |
Output is correct |
| 32 |
Correct |
10 ms |
16884 KB |
Output is correct |
| 33 |
Correct |
9 ms |
16848 KB |
Output is correct |
| 34 |
Correct |
10 ms |
16732 KB |
Output is correct |
| 35 |
Correct |
9 ms |
16940 KB |
Output is correct |
| 36 |
Correct |
10 ms |
16732 KB |
Output is correct |
| 37 |
Correct |
9 ms |
16732 KB |
Output is correct |
| 38 |
Correct |
9 ms |
16732 KB |
Output is correct |
| 39 |
Correct |
10 ms |
16944 KB |
Output is correct |
| 40 |
Correct |
9 ms |
16732 KB |
Output is correct |
| 41 |
Correct |
330 ms |
97280 KB |
Output is correct |
| 42 |
Correct |
327 ms |
97360 KB |
Output is correct |
| 43 |
Correct |
358 ms |
97360 KB |
Output is correct |
| 44 |
Correct |
327 ms |
97364 KB |
Output is correct |
| 45 |
Correct |
328 ms |
97240 KB |
Output is correct |
| 46 |
Correct |
334 ms |
97572 KB |
Output is correct |
| 47 |
Correct |
329 ms |
97212 KB |
Output is correct |
| 48 |
Correct |
326 ms |
97360 KB |
Output is correct |
| 49 |
Correct |
332 ms |
97364 KB |
Output is correct |
| 50 |
Correct |
329 ms |
97200 KB |
Output is correct |
| 51 |
Correct |
327 ms |
97224 KB |
Output is correct |
| 52 |
Correct |
332 ms |
97468 KB |
Output is correct |
| 53 |
Correct |
329 ms |
97344 KB |
Output is correct |
| 54 |
Correct |
334 ms |
97364 KB |
Output is correct |
| 55 |
Correct |
328 ms |
97364 KB |
Output is correct |
