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  1. #include <bits/stdc++.h>
  2. #define int long long
  3. using namespace std;
  4.  
  5. void solve() {
  6.     int n;
  7.     cin >> n;
  8.     vector<int> v(n);
  9.     for(int i=0;i<n;i++){
  10.     	cin>>v[i];
  11.     }
  12.     vector<int> a(n,0);
  13.     for(int i=0;i<n;i++){
  14.     	for(int j=0;j<=31;j++){
  15.     		if((v[i]&(1<<j))){
  16.     			a[i]=max(a[i],j);
  17.     		}
  18.     	}
  19.     }
  20.  
  21.     map<int,int> mp;
  22.     for(int i=0;i<n;i++){
  23.     	mp[a[i]]++;
  24.     }
  25.     int ans=0;
  26.     for(auto s:mp){
  27.     	int x=s.second;
  28.     	ans+=(x*(x-1))/2;
  29.     }
  30.     cout<<ans<<endl;
  31.  
  32.  
  33.  
  34. }
  35.  
  36. signed main() {
  37.     int t;
  38.     cin >> t;
  39.     while (t--) {
  40.         solve();
  41.     }
  42.     return 0;
  43. }
  44.  
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin
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5
5
1 4 3 7 10
3
1 1 1
4
6 2 5 3
2
2 4
1
1
stdout
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1
3
2
0
0
https://ideone.com/ThTd9k
language:
C++ (gcc 8.3)
created:
236 days ago
visibility:
public

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