#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int n, arr[303030];
ll lt[303030], rt[303030];
int main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
cin >> n;
for (int i = 1; i <= n; i++) cin >> arr[i];
vector<int> v;
for (int i = 1; i <= n; i++) {
lt[i] = lt[i - 1] + (v.end() - upper_bound(v.begin(), v.end(), arr[i]));
v.push_back(arr[i]);
sort(v.begin(), v.end());
}
v.clear();
for (int i = n; i >= 1; i--) {
rt[i] = rt[i + 1] + (v.end() - upper_bound(v.begin(), v.end(), arr[i]));
v.push_back(arr[i]);
sort(v.begin(), v.end());
}
ll ans = 1e18;
for (int i = 0; i <= n; i++) ans = min(ans, lt[i] + rt[i + 1]);
cout << ans << "\n";
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
340 KB |
Output is correct |
2 |
Correct |
0 ms |
340 KB |
Output is correct |
3 |
Correct |
1 ms |
328 KB |
Output is correct |
4 |
Correct |
0 ms |
340 KB |
Output is correct |
5 |
Correct |
1 ms |
340 KB |
Output is correct |
6 |
Correct |
0 ms |
340 KB |
Output is correct |
7 |
Correct |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
1 ms |
340 KB |
Output is correct |
9 |
Correct |
0 ms |
340 KB |
Output is correct |
10 |
Correct |
1 ms |
212 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
340 KB |
Output is correct |
2 |
Correct |
0 ms |
340 KB |
Output is correct |
3 |
Correct |
1 ms |
340 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
340 KB |
Output is correct |
7 |
Correct |
0 ms |
328 KB |
Output is correct |
8 |
Correct |
0 ms |
340 KB |
Output is correct |
9 |
Correct |
0 ms |
340 KB |
Output is correct |
10 |
Correct |
1 ms |
212 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
2 ms |
340 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
1071 ms |
908 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |