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  1. #include <iostream>
  2. #include <algorithm>
  3. #include <vector>
  4. using namespace std;
  5.  
  6. struct point{
  7.     int index;
  8.     int x;
  9.     int y;
  10. };
  11.  
  12. bool comp1(const point& p1,const point& p2){
  13.     if(p1.x<p2.x)
  14.         return true;
  15.     if(p1.x==p2.x){
  16.         if(p1.y<p2.y)
  17.             return true;
  18.     return false;
  19.     }
  20.  
  21.     return true;
  22. }
  23.  
  24. bool comp2(const point &p1,const point &p2){
  25.     if(p1.y<p2.y)
  26.         return true;
  27.     if(p1.y==p2.y){
  28.         if(p1.x<p2.x)
  29.             return true;
  30.     }
  31.     return false;
  32. }
  33.  
  34. int main() {
  35.         int n;
  36.         vector<point> px,py;
  37.         cin>>n;
  38.         point p;
  39.         for(int i=0;i<n;i++){
  40.             cin>>p.x>>p.y;
  41.             p.index = i+1;
  42.             px.push_back(p);
  43.             py.push_back(p);
  44.  
  45.         }
  46.  
  47.         std::cout << "input:\n";
  48.         for(const auto& p : px)
  49.             cout << p.x << " " << p.y << "\t   ";
  50.         cout<<endl;
  51.  
  52.         sort(px.begin(),px.end(),comp1);
  53.         sort(py.begin(),py.end(),comp2);
  54.  
  55.         std::cout << "increasing x, y:\n";
  56.         vector<point>::iterator it;
  57.         for(it=px.begin();it!=px.end();it++)
  58.             cout<<it->x<<" "<<it->y<<"\t   ";
  59.         cout<<endl;
  60.  
  61.         std::cout << "increasing y, x:\n";
  62.         for(it=py.begin();it!=py.end();it++)
  63.             cout<<it->x<<" "<<it->y<<"\t   ";
  64.         cout<<endl;
  65. }
  66.  
  67.  
Success #stdin #stdout 0s 3464KB
comments (?)
stdin 
3
2 0
1 1
1 0
stdout 
input:
2 0	   1 1	   1 0	   
increasing x, y:
1 0	   1 1	   2 0	   
increasing y, x:
1 0	   2 0	   1 1
https://ideone.com/9PpUoa
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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