#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
struct bitr {
void resize(int n) {
t.resize(n);
sz = n;
}
void add(int i, int x) {
while (i < sz) {
t[i] += x;
i |= i + 1;
}
}
int get(int i) {
int ans = 0;
while (i > -1) {
ans += t[i];
i &= i + 1;
--i;
}
return ans;
}
int operator()(int l, int r) {
return get(r - 1) - get(l - 1);
}
private:
int sz;
vector<int> t;
};
const int MAXN = 5001;
int a[MAXN];
int ra[MAXN];
int dp_[MAXN];
int* dp = dp_ + 1;
signed main() {
int n;
cin >> n;
for (int i = 0; i < n; ++i)
cin >> a[i];
for (int i = 0; i < n; ++i)
ra[--a[i]] = i;
for (int i = 0; i < n; ++i)
dp[i] = MAXN * MAXN;
for (int i = -1; i < n; ++i) {
bitr used;
bitr nonused;
used.resize(n);
nonused.resize(n);
for (int j = i + 1; j < n; ++j) {
nonused.add(ra[j], 1);
}
int add = 0;
for (int j = i + 1; j < n; ++j) {
nonused.add(ra[j], -1);
add += nonused.get(ra[j] - 1);
add -= used(ra[j], n);
add += used.get(ra[j]);
used.add(ra[j], 1);
dp[j] = min(dp[j], dp[i] + add);
}
}
cout << dp[n - 1] << '\n';
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
300 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
300 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
308 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
260 KB |
Output is correct |
| 19 |
Correct |
1 ms |
300 KB |
Output is correct |
| 20 |
Correct |
1 ms |
212 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
300 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
308 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
260 KB |
Output is correct |
| 19 |
Correct |
1 ms |
300 KB |
Output is correct |
| 20 |
Correct |
1 ms |
212 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
1 ms |
212 KB |
Output is correct |
| 23 |
Correct |
1 ms |
212 KB |
Output is correct |
| 24 |
Correct |
1 ms |
212 KB |
Output is correct |
| 25 |
Correct |
1 ms |
212 KB |
Output is correct |
| 26 |
Correct |
1 ms |
300 KB |
Output is correct |
| 27 |
Correct |
1 ms |
308 KB |
Output is correct |
| 28 |
Correct |
2 ms |
300 KB |
Output is correct |
| 29 |
Correct |
1 ms |
212 KB |
Output is correct |
| 30 |
Correct |
2 ms |
212 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
300 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
308 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
260 KB |
Output is correct |
| 19 |
Correct |
1 ms |
300 KB |
Output is correct |
| 20 |
Correct |
1 ms |
212 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
1 ms |
212 KB |
Output is correct |
| 23 |
Correct |
1 ms |
212 KB |
Output is correct |
| 24 |
Correct |
1 ms |
212 KB |
Output is correct |
| 25 |
Correct |
1 ms |
212 KB |
Output is correct |
| 26 |
Correct |
1 ms |
300 KB |
Output is correct |
| 27 |
Correct |
1 ms |
308 KB |
Output is correct |
| 28 |
Correct |
2 ms |
300 KB |
Output is correct |
| 29 |
Correct |
1 ms |
212 KB |
Output is correct |
| 30 |
Correct |
2 ms |
212 KB |
Output is correct |
| 31 |
Correct |
16 ms |
212 KB |
Output is correct |
| 32 |
Correct |
17 ms |
212 KB |
Output is correct |
| 33 |
Correct |
17 ms |
212 KB |
Output is correct |
| 34 |
Correct |
15 ms |
324 KB |
Output is correct |
| 35 |
Correct |
16 ms |
212 KB |
Output is correct |
| 36 |
Correct |
15 ms |
320 KB |
Output is correct |
| 37 |
Correct |
16 ms |
212 KB |
Output is correct |
| 38 |
Correct |
16 ms |
324 KB |
Output is correct |
| 39 |
Correct |
17 ms |
212 KB |
Output is correct |
| 40 |
Correct |
16 ms |
212 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
300 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
308 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
260 KB |
Output is correct |
| 19 |
Correct |
1 ms |
300 KB |
Output is correct |
| 20 |
Correct |
1 ms |
212 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
1 ms |
212 KB |
Output is correct |
| 23 |
Correct |
1 ms |
212 KB |
Output is correct |
| 24 |
Correct |
1 ms |
212 KB |
Output is correct |
| 25 |
Correct |
1 ms |
212 KB |
Output is correct |
| 26 |
Correct |
1 ms |
300 KB |
Output is correct |
| 27 |
Correct |
1 ms |
308 KB |
Output is correct |
| 28 |
Correct |
2 ms |
300 KB |
Output is correct |
| 29 |
Correct |
1 ms |
212 KB |
Output is correct |
| 30 |
Correct |
2 ms |
212 KB |
Output is correct |
| 31 |
Correct |
16 ms |
212 KB |
Output is correct |
| 32 |
Correct |
17 ms |
212 KB |
Output is correct |
| 33 |
Correct |
17 ms |
212 KB |
Output is correct |
| 34 |
Correct |
15 ms |
324 KB |
Output is correct |
| 35 |
Correct |
16 ms |
212 KB |
Output is correct |
| 36 |
Correct |
15 ms |
320 KB |
Output is correct |
| 37 |
Correct |
16 ms |
212 KB |
Output is correct |
| 38 |
Correct |
16 ms |
324 KB |
Output is correct |
| 39 |
Correct |
17 ms |
212 KB |
Output is correct |
| 40 |
Correct |
16 ms |
212 KB |
Output is correct |
| 41 |
Correct |
846 ms |
400 KB |
Output is correct |
| 42 |
Correct |
843 ms |
400 KB |
Output is correct |
| 43 |
Correct |
855 ms |
412 KB |
Output is correct |
| 44 |
Correct |
849 ms |
412 KB |
Output is correct |
| 45 |
Correct |
849 ms |
340 KB |
Output is correct |
| 46 |
Correct |
837 ms |
396 KB |
Output is correct |
| 47 |
Correct |
822 ms |
460 KB |
Output is correct |
| 48 |
Correct |
823 ms |
460 KB |
Output is correct |
| 49 |
Correct |
832 ms |
400 KB |
Output is correct |
| 50 |
Correct |
838 ms |
400 KB |
Output is correct |
| 51 |
Correct |
835 ms |
416 KB |
Output is correct |
| 52 |
Correct |
826 ms |
340 KB |
Output is correct |
| 53 |
Correct |
835 ms |
396 KB |
Output is correct |
| 54 |
Correct |
837 ms |
340 KB |
Output is correct |
| 55 |
Correct |
832 ms |
400 KB |
Output is correct |
