Submission #1102633

#	Time	Username	Problem	Language	Result	Execution time	Memory
1102633		ramzialoulou	Advertisement 2 (JOI23_ho_t2)	C++17	100 / 100	118 ms	13900 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#ifdef Ramzi
#include "debug.h"
#else
#define debug(...)
#endif

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int n;
  cin >> n;
  vector<pair<int ,int>> p(n);
  for (int i = 0; i < n; i++) {
    int x, e;
    cin >> x >> e;
    p[i].first = x - e;
    p[i].second = x + e;
  }
  auto com = [&](pair<int, int> &a, pair<int, int> &b) -> bool {
    if (a.first != b.first) {
      return a.first < b.first;
    }
    return a.second > b.second;
  };
  sort(p.begin(), p.end(), com);
  int ans = 0, mx = 0;
  for (auto [f, s] : p) {
    if (s > mx) {
      ans += 1;
      mx = s;
    }
  }
  cout << ans << "\n";
  /*
   * |Xi - Xj| <= Ei - Ej
   * Xi - Ei <= Xj - Ej this
   * Xj + Ej <= Ei + Xi this
   * 4 2
   * 2 3
   * 3 4
   * 6 5
   */
}

• Subtask 1: 10 / 10
• Subtask 2: 23 / 23
• Subtask 3: 36 / 36
• Subtask 4: 31 / 31