| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 939565 |
2024-03-06T14:08:14 Z |
kitlix |
Group Photo (JOI21_ho_t3) |
C++17 |
|
710 ms |
196804 KB |
#include <bits/stdc++.h>
using namespace std;
signed main() {
ios_base::sync_with_stdio(0), cin.tie(0);
int n;
cin >> n;
vector<int> ind(n);
for (int i = 0; i < n; ++i) {
int ai;
cin >> ai;
--ai;
ind[ai] = i;
}
vector<vector<int>> invprefsum(n, vector<int>(n)), antiinvprefsum(n, vector<int>(n));
for (int a = 0; a < n; ++a) {
for (int b = a + 1; b < n; ++b) {
if (ind[b] < ind[a])
invprefsum[a][b] = 1;
else
antiinvprefsum[a][b] = 1;
}
}
for (int i = 0; i < n; ++i) {
for (int j = 0; j < n; ++j) {
if (i) {
invprefsum[i][j] += invprefsum[i - 1][j];
antiinvprefsum[i][j] += antiinvprefsum[i - 1][j];
}
if (j) {
invprefsum[i][j] += invprefsum[i][j - 1];
antiinvprefsum[i][j] += antiinvprefsum[i][j - 1];
}
if (i && j) {
invprefsum[i][j] -= invprefsum[i - 1][j - 1];
antiinvprefsum[i][j] -= antiinvprefsum[i - 1][j - 1];
}
}
}
auto cinv = [&](int l1, int r1, int l2, int r2) {
int ans = invprefsum[r1][r2];
if (l1)
ans -= invprefsum[l1 - 1][r2];
if (l2)
ans -= invprefsum[r1][l2 - 1];
if (l1 && l2)
ans += invprefsum[l1 - 1][l2 - 1];
return ans;
};
auto cantiinv = [&](int l1, int r1, int l2, int r2) {
int ans = antiinvprefsum[r1][r2];
if (l1)
ans -= antiinvprefsum[l1 - 1][r2];
if (l2)
ans -= antiinvprefsum[r1][l2 - 1];
if (l1 && l2)
ans += antiinvprefsum[l1 - 1][l2 - 1];
return ans;
};
vector<int> dp(n);
for (int i = 1; i < n; ++i) {
dp[i] = cantiinv(0, i, 0, i);
for (int j = i; j > 0; --j) {
int newval = cantiinv(j, i, j, i);
newval += dp[j - 1];
newval += cinv(0, j - 1, j, i);
dp[i] = min(dp[i], newval);
}
}
cout << dp.back();
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
1 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
1 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
0 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
344 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
0 ms |
456 KB |
Output is correct |
| 16 |
Correct |
0 ms |
348 KB |
Output is correct |
| 17 |
Correct |
0 ms |
348 KB |
Output is correct |
| 18 |
Correct |
0 ms |
452 KB |
Output is correct |
| 19 |
Correct |
1 ms |
344 KB |
Output is correct |
| 20 |
Correct |
0 ms |
456 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
1 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
0 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
344 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
0 ms |
456 KB |
Output is correct |
| 16 |
Correct |
0 ms |
348 KB |
Output is correct |
| 17 |
Correct |
0 ms |
348 KB |
Output is correct |
| 18 |
Correct |
0 ms |
452 KB |
Output is correct |
| 19 |
Correct |
1 ms |
344 KB |
Output is correct |
| 20 |
Correct |
0 ms |
456 KB |
Output is correct |
| 21 |
Correct |
1 ms |
604 KB |
Output is correct |
| 22 |
Correct |
1 ms |
600 KB |
Output is correct |
| 23 |
Correct |
1 ms |
604 KB |
Output is correct |
| 24 |
Correct |
1 ms |
600 KB |
Output is correct |
| 25 |
Correct |
1 ms |
708 KB |
Output is correct |
| 26 |
Correct |
1 ms |
604 KB |
Output is correct |
| 27 |
Correct |
1 ms |
604 KB |
Output is correct |
| 28 |
Correct |
1 ms |
604 KB |
Output is correct |
| 29 |
Correct |
1 ms |
604 KB |
Output is correct |
| 30 |
Correct |
1 ms |
604 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
1 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
0 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
344 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
0 ms |
456 KB |
Output is correct |
| 16 |
Correct |
0 ms |
348 KB |
Output is correct |
| 17 |
Correct |
0 ms |
348 KB |
Output is correct |
| 18 |
Correct |
0 ms |
452 KB |
Output is correct |
| 19 |
Correct |
1 ms |
344 KB |
Output is correct |
| 20 |
Correct |
0 ms |
456 KB |
Output is correct |
| 21 |
Correct |
1 ms |
604 KB |
Output is correct |
| 22 |
Correct |
1 ms |
600 KB |
Output is correct |
| 23 |
Correct |
1 ms |
604 KB |
Output is correct |
| 24 |
Correct |
1 ms |
600 KB |
Output is correct |
| 25 |
Correct |
1 ms |
708 KB |
Output is correct |
| 26 |
Correct |
1 ms |
604 KB |
Output is correct |
| 27 |
Correct |
1 ms |
604 KB |
Output is correct |
| 28 |
Correct |
1 ms |
604 KB |
Output is correct |
| 29 |
Correct |
1 ms |
604 KB |
Output is correct |
| 30 |
Correct |
1 ms |
604 KB |
Output is correct |
| 31 |
Correct |
7 ms |
5468 KB |
Output is correct |
| 32 |
Correct |
7 ms |
5468 KB |
Output is correct |
| 33 |
Correct |
8 ms |
5624 KB |
Output is correct |
| 34 |
Correct |
7 ms |
5468 KB |
Output is correct |
| 35 |
Correct |
7 ms |
5468 KB |
Output is correct |
| 36 |
Correct |
7 ms |
5468 KB |
Output is correct |
| 37 |
Correct |
7 ms |
5468 KB |
Output is correct |
| 38 |
Correct |
8 ms |
5468 KB |
Output is correct |
| 39 |
Correct |
7 ms |
5540 KB |
Output is correct |
| 40 |
Correct |
8 ms |
5468 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
1 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
0 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
344 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
0 ms |
456 KB |
Output is correct |
| 16 |
Correct |
0 ms |
348 KB |
Output is correct |
| 17 |
Correct |
0 ms |
348 KB |
Output is correct |
| 18 |
Correct |
0 ms |
452 KB |
Output is correct |
| 19 |
Correct |
1 ms |
344 KB |
Output is correct |
| 20 |
Correct |
0 ms |
456 KB |
Output is correct |
| 21 |
Correct |
1 ms |
604 KB |
Output is correct |
| 22 |
Correct |
1 ms |
600 KB |
Output is correct |
| 23 |
Correct |
1 ms |
604 KB |
Output is correct |
| 24 |
Correct |
1 ms |
600 KB |
Output is correct |
| 25 |
Correct |
1 ms |
708 KB |
Output is correct |
| 26 |
Correct |
1 ms |
604 KB |
Output is correct |
| 27 |
Correct |
1 ms |
604 KB |
Output is correct |
| 28 |
Correct |
1 ms |
604 KB |
Output is correct |
| 29 |
Correct |
1 ms |
604 KB |
Output is correct |
| 30 |
Correct |
1 ms |
604 KB |
Output is correct |
| 31 |
Correct |
7 ms |
5468 KB |
Output is correct |
| 32 |
Correct |
7 ms |
5468 KB |
Output is correct |
| 33 |
Correct |
8 ms |
5624 KB |
Output is correct |
| 34 |
Correct |
7 ms |
5468 KB |
Output is correct |
| 35 |
Correct |
7 ms |
5468 KB |
Output is correct |
| 36 |
Correct |
7 ms |
5468 KB |
Output is correct |
| 37 |
Correct |
7 ms |
5468 KB |
Output is correct |
| 38 |
Correct |
8 ms |
5468 KB |
Output is correct |
| 39 |
Correct |
7 ms |
5540 KB |
Output is correct |
| 40 |
Correct |
8 ms |
5468 KB |
Output is correct |
| 41 |
Correct |
547 ms |
196308 KB |
Output is correct |
| 42 |
Correct |
553 ms |
196176 KB |
Output is correct |
| 43 |
Correct |
710 ms |
196720 KB |
Output is correct |
| 44 |
Correct |
695 ms |
196540 KB |
Output is correct |
| 45 |
Correct |
702 ms |
196544 KB |
Output is correct |
| 46 |
Correct |
550 ms |
196584 KB |
Output is correct |
| 47 |
Correct |
547 ms |
196576 KB |
Output is correct |
| 48 |
Correct |
556 ms |
196676 KB |
Output is correct |
| 49 |
Correct |
547 ms |
196588 KB |
Output is correct |
| 50 |
Correct |
545 ms |
196436 KB |
Output is correct |
| 51 |
Correct |
542 ms |
196804 KB |
Output is correct |
| 52 |
Correct |
542 ms |
196580 KB |
Output is correct |
| 53 |
Correct |
548 ms |
196584 KB |
Output is correct |
| 54 |
Correct |
545 ms |
196568 KB |
Output is correct |
| 55 |
Correct |
554 ms |
196688 KB |
Output is correct |
