#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
struct Fenwick {
int n;
vector <int> t;
void add(int pos, int delta) {
for (int i = pos + 1; i <= n; i += i & -i) t[i] += delta;
}
int get(int pos) {
int sum = 0;
for (int i = pos; i > 0; i -= i & -i) sum += t[i];
return sum;
}
int get(int l, int r) {
return get(r) - get(l);
}
Fenwick(int nn) : n(nn) {
t = vector <int>(n + 1, 0);
}
};
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int n;
cin >> n;
vector <int> h(n);
for (int i = 0; i < n; i++) cin >> h[i];
vector <int> pos(n);
for (int i = 0; i < n; i++) {
h[i]--;
pos[h[i]] = i;
}
const int inf = 1e9;
vector <int> dp(n + 1);
dp[0] = 0;
for (int i = 0; i < n; i++) {
dp[i + 1] = inf;
Fenwick f(n);
int cur = 0;
for (int j = i; j >= 0; j--) {
cur += f.get(pos[j], n) - f.get(pos[j]);
f.add(pos[j], 1);
dp[i + 1] = min(dp[i + 1], dp[j] + cur);
}
}
int ans = dp[n];
Fenwick f(n);
for (int i = 0; i < n; i++) {
ans += f.get(pos[i], n);
f.add(pos[i], 1);
}
cout << ans << endl;
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
0 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
492 KB |
Output is correct |
| 9 |
Correct |
0 ms |
364 KB |
Output is correct |
| 10 |
Correct |
0 ms |
364 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
0 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
492 KB |
Output is correct |
| 9 |
Correct |
0 ms |
364 KB |
Output is correct |
| 10 |
Correct |
0 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
0 ms |
364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Correct |
0 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Correct |
0 ms |
364 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
0 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
492 KB |
Output is correct |
| 9 |
Correct |
0 ms |
364 KB |
Output is correct |
| 10 |
Correct |
0 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
0 ms |
364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Correct |
0 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Correct |
0 ms |
364 KB |
Output is correct |
| 21 |
Correct |
1 ms |
364 KB |
Output is correct |
| 22 |
Correct |
1 ms |
364 KB |
Output is correct |
| 23 |
Correct |
1 ms |
364 KB |
Output is correct |
| 24 |
Correct |
1 ms |
364 KB |
Output is correct |
| 25 |
Correct |
1 ms |
364 KB |
Output is correct |
| 26 |
Correct |
1 ms |
364 KB |
Output is correct |
| 27 |
Correct |
1 ms |
364 KB |
Output is correct |
| 28 |
Correct |
1 ms |
384 KB |
Output is correct |
| 29 |
Correct |
1 ms |
364 KB |
Output is correct |
| 30 |
Correct |
1 ms |
364 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
0 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
492 KB |
Output is correct |
| 9 |
Correct |
0 ms |
364 KB |
Output is correct |
| 10 |
Correct |
0 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
0 ms |
364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Correct |
0 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Correct |
0 ms |
364 KB |
Output is correct |
| 21 |
Correct |
1 ms |
364 KB |
Output is correct |
| 22 |
Correct |
1 ms |
364 KB |
Output is correct |
| 23 |
Correct |
1 ms |
364 KB |
Output is correct |
| 24 |
Correct |
1 ms |
364 KB |
Output is correct |
| 25 |
Correct |
1 ms |
364 KB |
Output is correct |
| 26 |
Correct |
1 ms |
364 KB |
Output is correct |
| 27 |
Correct |
1 ms |
364 KB |
Output is correct |
| 28 |
Correct |
1 ms |
384 KB |
Output is correct |
| 29 |
Correct |
1 ms |
364 KB |
Output is correct |
| 30 |
Correct |
1 ms |
364 KB |
Output is correct |
| 31 |
Correct |
10 ms |
364 KB |
Output is correct |
| 32 |
Correct |
10 ms |
364 KB |
Output is correct |
| 33 |
Correct |
10 ms |
364 KB |
Output is correct |
| 34 |
Correct |
9 ms |
364 KB |
Output is correct |
| 35 |
Correct |
9 ms |
364 KB |
Output is correct |
| 36 |
Correct |
9 ms |
364 KB |
Output is correct |
| 37 |
Correct |
9 ms |
364 KB |
Output is correct |
| 38 |
Correct |
9 ms |
364 KB |
Output is correct |
| 39 |
Correct |
9 ms |
364 KB |
Output is correct |
| 40 |
Correct |
9 ms |
364 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
0 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
492 KB |
Output is correct |
| 9 |
Correct |
0 ms |
364 KB |
Output is correct |
| 10 |
Correct |
0 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
0 ms |
364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Correct |
0 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Correct |
0 ms |
364 KB |
Output is correct |
| 21 |
Correct |
1 ms |
364 KB |
Output is correct |
| 22 |
Correct |
1 ms |
364 KB |
Output is correct |
| 23 |
Correct |
1 ms |
364 KB |
Output is correct |
| 24 |
Correct |
1 ms |
364 KB |
Output is correct |
| 25 |
Correct |
1 ms |
364 KB |
Output is correct |
| 26 |
Correct |
1 ms |
364 KB |
Output is correct |
| 27 |
Correct |
1 ms |
364 KB |
Output is correct |
| 28 |
Correct |
1 ms |
384 KB |
Output is correct |
| 29 |
Correct |
1 ms |
364 KB |
Output is correct |
| 30 |
Correct |
1 ms |
364 KB |
Output is correct |
| 31 |
Correct |
10 ms |
364 KB |
Output is correct |
| 32 |
Correct |
10 ms |
364 KB |
Output is correct |
| 33 |
Correct |
10 ms |
364 KB |
Output is correct |
| 34 |
Correct |
9 ms |
364 KB |
Output is correct |
| 35 |
Correct |
9 ms |
364 KB |
Output is correct |
| 36 |
Correct |
9 ms |
364 KB |
Output is correct |
| 37 |
Correct |
9 ms |
364 KB |
Output is correct |
| 38 |
Correct |
9 ms |
364 KB |
Output is correct |
| 39 |
Correct |
9 ms |
364 KB |
Output is correct |
| 40 |
Correct |
9 ms |
364 KB |
Output is correct |
| 41 |
Correct |
454 ms |
492 KB |
Output is correct |
| 42 |
Correct |
467 ms |
364 KB |
Output is correct |
| 43 |
Correct |
477 ms |
512 KB |
Output is correct |
| 44 |
Correct |
513 ms |
364 KB |
Output is correct |
| 45 |
Correct |
484 ms |
364 KB |
Output is correct |
| 46 |
Correct |
467 ms |
492 KB |
Output is correct |
| 47 |
Correct |
448 ms |
492 KB |
Output is correct |
| 48 |
Correct |
452 ms |
476 KB |
Output is correct |
| 49 |
Correct |
447 ms |
492 KB |
Output is correct |
| 50 |
Correct |
448 ms |
492 KB |
Output is correct |
| 51 |
Correct |
456 ms |
476 KB |
Output is correct |
| 52 |
Correct |
449 ms |
492 KB |
Output is correct |
| 53 |
Correct |
456 ms |
476 KB |
Output is correct |
| 54 |
Correct |
450 ms |
492 KB |
Output is correct |
| 55 |
Correct |
460 ms |
364 KB |
Output is correct |
