fork download
copy 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	long long t,n,i,j,s=0;
  6. 	cin>>n;
  7. 	long long a[n];
  8. 	map<long long,long long>m;
  9. 	for(i=0;i<n;i++)
  10. 	{cin>>a[i];
  11. 	 m[a[i]]++;}
  12. 	 for(auto x : m)
  13. 	 {
  14. 	     if(x.second%2==0&&x.second!=0)
  15. 	     {
  16. 	         s+=x.second/2;
  17. 	     }
  18. 	     else if(x.second%2==1&&x.second!=0)
  19. 	     {
  20. 	          s+=x.second/2;
  21. 	          s++;
  22. 	     }
  23. 	 }
  24. 	 cout<<s<<"\n";
  25.  
  26.  
  27. 	return 0;
  28. }
  29.  
Success #stdin #stdout 0s 4924KB
comments (?)
stdin
copy 
3
1 2 2
stdout
copy 
2
https://ideone.com/FKvbop
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!