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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5.     ios::sync_with_stdio(false), cin.tie(nullptr);
  6.     int n; cin >> n;
  7.     vector <pair <int, int>> v(n);
  8.     for (int i = 0; i < n; ++i) cin >> v[i].first >> v[i].second;
  9.     sort(v.begin(), v.end());
  10.     int ans = 0, lim = 0;
  11.     for (int i = 0; i < n; ++i) {
  12.         if (v[i].second < lim) ++ans;
  13.         else lim = v[i].second;
  14.     }
  15.     cout << ans << endl;
  16. }
  17.  
Success #stdin #stdout 0.01s 5316KB
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https://ideone.com/u6uJS5
language:
C++14 (gcc 8.3)
created:
8 days ago
visibility:
public

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