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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. pair <int,int> a[100005];
  4. int cnt=0,n;
  5. int main()
  6. {
  7.     if (fopen("stline.inp", "r"))
  8.     {
  9.         freopen("stline.inp", "r", stdin);
  10.         freopen("stline.out", "w", stdout);
  11.     }
  12.     cin >> n;
  13.     for (int i=1; i<=n; i++)
  14.     {
  15.         cin >> a[i].first >> a[i].second;
  16.     }
  17.     sort(a+1,a+n+1);
  18.     for (int i=2; i<=n; i++)
  19.     {
  20.         if (a[i].first<a[i-1].second)
  21.         {
  22.             cnt++;
  23.             if (a[i].second>a[i-1].second)
  24.             {
  25.                 a[i].second = a[i-1].second;
  26.             }
  27.         }
  28.     }
  29.     cout << cnt;
  30. }
  31.  
Success #stdin #stdout 0.01s 5300KB
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Standard input is empty
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Standard output is empty
https://ideone.com/FPV9rT
language:
C++14 (gcc 8.3)
created:
4 hours ago
visibility:
public

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