Submission #996294

#	Time	Username	Problem	Language	Result	Execution time	Memory
996294		MilosMilutinovic	Gift Exchange (JOI24_ho_t4)	C++14	50 / 100	2549 ms	5288 KiB

Main

#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n;
  cin >> n;
  vector<int> a(n);
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  vector<int> b(n);
  for (int i = 0; i < n; i++) {
    cin >> b[i];
  }
  int q;
  cin >> q;
  while (q--) {
    int l, r;
    cin >> l >> r;
    --l; --r;
    vector<pair<int, int>> ev;
    for (int i = l; i <= r; i++) {
      ev.emplace_back(b[i], +1);
      ev.emplace_back(a[i], -1);
    }
    sort(ev.begin(), ev.end());
    bool ok = true;
    int bal = 0;
    int mx = 0;
    for (auto& p : ev) {
      int v = p.second;
      bal += v;
      if (bal < 0) {
        ok = false;
      }
      if (bal == 0) {
        if (mx <= 1) {
          ok = false;
        }
        mx = 0;
      }
      mx = max(mx, bal);
    }
    cout << (ok ? "Yes" : "No") << '\n';
  }
  return 0;
}

• Subtask 1: 4 / 4
• Subtask 2: 5 / 5
• Subtask 3: 10 / 10
• Subtask 4: 31 / 31
• Subtask 5: 0 / 8
• Subtask 6: 0 / 12
• Subtask 7: 0 / 18
• Subtask 8: 0 / 12