oj.uz

Submission #682619

# Submission time Handle Problem Language Result Execution time Memory
682619 2023-01-16T15:33:08 Z vjudge1 Index (COCI21_index) C++17
60 / 110
 2500 ms 31796 KB 
#include <bits/stdc++.h>
// Sample problem: https://oj.uz/problem/view/COCI21_index?locale=en

using namespace std;

const int N = 2e5;
const int INF = 1e9;
vector<pair<int, int>> aib[1 + N];

void build() {
  for (int i = 1; i <= N; ++i) {
    aib[i].emplace_back(0, 0);
  }
}

void update(int version, int p, int v) {
  for (int i = p; i <= N; i += i & -i) {
    aib[i].emplace_back(version, aib[i].back().second + v);
  }
}

int query(int version, int p) {
  int res = 0;

  for (int i = p; i > 0; i = i & (i - 1)) {
    res += prev(upper_bound(aib[i].begin(), aib[i].end(), make_pair(version, INF)))->second;
  }

  return res;
}

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);

  int n, q;
  cin >> n >> q;

  build();

  for (int i = 1; i <= n; ++i) {
    int x;
    cin >> x;

    update(i, x, 1);
  }

  for (int i = 0; i < q; ++i) {
    int l, r;
    cin >> l >> r;

    int len = r - l + 1;

    int st = 2, dr = len, res = 1;

    while (st <= dr) {
      int mid = (st + dr) / 2;

      if (len - (query(r, mid - 1) - query(l - 1, mid - 1)) >= mid) {
        res = mid;
        st = mid + 1;
      } else {
        dr = mid - 1;
      }
    }

    cout << res << '\n';
  }

  return 0;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 11348 KB Output is correct
2 Correct 15 ms 11348 KB Output is correct
3 Correct 16 ms 11364 KB Output is correct
4 Correct 15 ms 11288 KB Output is correct
5 Correct 16 ms 11296 KB Output is correct
6 Correct 15 ms 11412 KB Output is correct
7 Correct 16 ms 11416 KB Output is correct
8 Correct 14 ms 11324 KB Output is correct
9 Correct 14 ms 11348 KB Output is correct
10 Correct 16 ms 11424 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 11348 KB Output is correct
2 Correct 15 ms 11348 KB Output is correct
3 Correct 16 ms 11364 KB Output is correct
4 Correct 15 ms 11288 KB Output is correct
5 Correct 16 ms 11296 KB Output is correct
6 Correct 15 ms 11412 KB Output is correct
7 Correct 16 ms 11416 KB Output is correct
8 Correct 14 ms 11324 KB Output is correct
9 Correct 14 ms 11348 KB Output is correct
10 Correct 16 ms 11424 KB Output is correct
11 Correct 531 ms 17060 KB Output is correct
12 Correct 505 ms 16932 KB Output is correct
13 Correct 553 ms 16800 KB Output is correct
14 Correct 546 ms 16836 KB Output is correct
15 Correct 519 ms 16948 KB Output is correct
16 Correct 555 ms 16968 KB Output is correct
17 Correct 525 ms 17036 KB Output is correct
18 Correct 556 ms 16792 KB Output is correct
19 Correct 564 ms 16740 KB Output is correct
20 Correct 529 ms 16952 KB Output is correct

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 11348 KB Output is correct
2 Correct 15 ms 11348 KB Output is correct
3 Correct 16 ms 11364 KB Output is correct
4 Correct 15 ms 11288 KB Output is correct
5 Correct 16 ms 11296 KB Output is correct
6 Correct 15 ms 11412 KB Output is correct
7 Correct 16 ms 11416 KB Output is correct
8 Correct 14 ms 11324 KB Output is correct
9 Correct 14 ms 11348 KB Output is correct
10 Correct 16 ms 11424 KB Output is correct
11 Correct 531 ms 17060 KB Output is correct
12 Correct 505 ms 16932 KB Output is correct
13 Correct 553 ms 16800 KB Output is correct
14 Correct 546 ms 16836 KB Output is correct
15 Correct 519 ms 16948 KB Output is correct
16 Correct 555 ms 16968 KB Output is correct
17 Correct 525 ms 17036 KB Output is correct
18 Correct 556 ms 16792 KB Output is correct
19 Correct 564 ms 16740 KB Output is correct
20 Correct 529 ms 16952 KB Output is correct
21 Execution timed out 2598 ms 31796 KB Time limit exceeded
22 Halted 0 ms 0 KB -