oj.uz

Submission #733250

# Submission time Handle Problem Language Result Execution time Memory
733250 2023-04-30T09:53:21 Z tch1cherin Group Photo (JOI21_ho_t3) C++17
100 / 100
 464 ms 468 KB 
#include <bits/stdc++.h>
using namespace std;

struct fenwick {
  int N;
  vector<int> F;

  fenwick(int n) : N(n), F(n + 1) {}

  void add(int i, int v) {
    for (i++; i <= N; i += i & -i) {
      F[i] += v;
    }
  }

  int query(int r) {
    int ans = 0;
    for (; r > 0; r -= r & -r) {
      ans += F[r];
    }
    return ans;
  }
};

void solve() {
  int N;
  cin >> N;
  vector<int> H(N);
  for (int &v : H) {
    cin >> v;
    v--;
  }
  vector<int> pos(N);
  for (int i = 0; i < N; i++) {
    pos[H[i]] = i;
  }
  vector<int> p(N);
  fenwick f(N);
  for (int i = 0; i < N; i++) {
    p[i] = i - f.query(pos[i]); 
    f.add(pos[i], 1);
  }
  vector<long long> dp(N + 1);
  for (int i = 0; i < N; i++) {
    fenwick right(N);
    long long I = 0, X = 0;
    dp[i + 1] = LLONG_MAX; 
    for (int l = i; l >= 0; l--) {
      X += p[l] - right.query(pos[l]);  
      I += right.query(pos[l]);
      dp[i + 1] = min(dp[i + 1], dp[l] + min(I, 1ll * (i - l) * (i - l + 1) / 2 - I) + X);
      right.add(pos[l], 1);  
    }
  }
  cout << dp[N] << "\n";
}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  solve();
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 316 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 320 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 316 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 320 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 324 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 320 KB Output is correct
14 Correct 1 ms 316 KB Output is correct
15 Correct 1 ms 320 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 212 KB Output is correct
19 Correct 1 ms 320 KB Output is correct
20 Correct 1 ms 212 KB Output is correct

Subtask #3
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 316 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 320 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 324 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 320 KB Output is correct
14 Correct 1 ms 316 KB Output is correct
15 Correct 1 ms 320 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 212 KB Output is correct
19 Correct 1 ms 320 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 316 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 212 KB Output is correct
27 Correct 2 ms 212 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 316 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 320 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 324 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 320 KB Output is correct
14 Correct 1 ms 316 KB Output is correct
15 Correct 1 ms 320 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 212 KB Output is correct
19 Correct 1 ms 320 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 316 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 212 KB Output is correct
27 Correct 2 ms 212 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 9 ms 320 KB Output is correct
32 Correct 8 ms 340 KB Output is correct
33 Correct 8 ms 344 KB Output is correct
34 Correct 8 ms 348 KB Output is correct
35 Correct 8 ms 340 KB Output is correct
36 Correct 12 ms 316 KB Output is correct
37 Correct 9 ms 340 KB Output is correct
38 Correct 8 ms 340 KB Output is correct
39 Correct 9 ms 320 KB Output is correct
40 Correct 9 ms 372 KB Output is correct

Subtask #5
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 316 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 320 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 324 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 320 KB Output is correct
14 Correct 1 ms 316 KB Output is correct
15 Correct 1 ms 320 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 212 KB Output is correct
19 Correct 1 ms 320 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 316 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 212 KB Output is correct
27 Correct 2 ms 212 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 9 ms 320 KB Output is correct
32 Correct 8 ms 340 KB Output is correct
33 Correct 8 ms 344 KB Output is correct
34 Correct 8 ms 348 KB Output is correct
35 Correct 8 ms 340 KB Output is correct
36 Correct 12 ms 316 KB Output is correct
37 Correct 9 ms 340 KB Output is correct
38 Correct 8 ms 340 KB Output is correct
39 Correct 9 ms 320 KB Output is correct
40 Correct 9 ms 372 KB Output is correct
41 Correct 400 ms 468 KB Output is correct
42 Correct 464 ms 468 KB Output is correct
43 Correct 433 ms 468 KB Output is correct
44 Correct 369 ms 468 KB Output is correct
45 Correct 395 ms 456 KB Output is correct
46 Correct 386 ms 468 KB Output is correct
47 Correct 393 ms 468 KB Output is correct
48 Correct 381 ms 464 KB Output is correct
49 Correct 368 ms 468 KB Output is correct
50 Correct 397 ms 468 KB Output is correct
51 Correct 379 ms 468 KB Output is correct
52 Correct 378 ms 468 KB Output is correct
53 Correct 385 ms 468 KB Output is correct
54 Correct 375 ms 460 KB Output is correct
55 Correct 420 ms 468 KB Output is correct