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  1. //RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4. using ll=long long;
  5.  
  6. int main() {
  7. 	// your code goes here
  8. 	int n;
  9. 	cin>>n;
  10. 	vector<ll>arr(n);
  11. 	for(ll i=0;i<n;i++) cin>>arr[i];
  12. 	unordered_map<int,int>mp;
  13.  
  14. 	for(ll i=0;i<n;i++){
  15. 		mp[arr[i]]++;
  16. 	}
  17. 	ll ans=0;
  18. 	for(auto x:mp){
  19. 		ll y=x.second;
  20. 		ll t=y%3;
  21. 		ll s=y/3;
  22. 		ll curr=0;
  23. 		if(t==1){
  24. 			 curr=2;
  25. 			curr+=(s-1>=0)?s-1:0;
  26. 		}
  27. 		else if(t==2) {
  28. 			curr=1+s;
  29. 		}
  30. 		else curr=s;
  31. 		ans+=curr;
  32. 	}
  33. 	cout<<ans<<endl;
  34. 	return 0;
  35. }
  36. //RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM
Success #stdin #stdout 0s 5320KB
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stdout
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https://ideone.com/Wvs8PU
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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