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  1. #include "bits/stdc++.h"
  2. #define ll               long long
  3.  
  4. using namespace std;
  5.  
  6.  
  7. void SOLVE(){
  8.     int n,l,r;
  9.     cin>>n;
  10.     vector<pair<int,int>>v;
  11.     for(int i=0;i<n;i++){
  12.         cin>>l>>r;
  13.         v.push_back({r,l});
  14.     }
  15.  
  16.     sort(v.begin(),v.end());
  17.  
  18.  
  19.     int cur=0;
  20.     int cnt=0;
  21.     for(int i=0;i<n;i++){
  22.         if(v[i].second>=cur){
  23.             cnt++;
  24.             cur=v[i].first;
  25.         }
  26.     }
  27.     cout<<cnt<<endl;
  28.  
  29.  
  30. }
  31.  
  32. signed main(){
  33.     int T=1;
  34. //    cin>>T;
  35.     while(T--)
  36.         SOLVE();
  37.  
  38.     return 0;
  39. }
Success #stdin #stdout 0.01s 5292KB
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https://ideone.com/wLsBvF
language:
C++14 (gcc 8.3)
created:
336 days ago
visibility:
secret

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