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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. const long long MaxN = 1e5 + 5;
  5.  
  6. long long n, a[MaxN];
  7.  
  8. long long rotate_left(long long x, long long k)
  9. {
  10.     return ((x << k) | (x >> (32-k))) & 0xFFFFFFFFLL;
  11. }
  12.  
  13. void input()
  14. {
  15.     cin >> n;
  16.     for (long long i=1; i<=n; i++)
  17.     {
  18.         cin >> a[i];
  19.     }
  20. }
  21.  
  22. void solve()
  23. {
  24.     map<long long, long long> cnt;
  25.  
  26.     long long ans=0;
  27.  
  28.     for (long long i=1; i<=n; i++)
  29.     {
  30.         long long mx=a[i];
  31.  
  32.         for (long long j=1; j<32; j++)
  33.         {
  34.             long long x=rotate_left(a[i],j);
  35.             mx=max(mx,x);
  36.         }
  37.  
  38.         ans+=cnt[mx];
  39.         cnt[mx]++;
  40.     }
  41.  
  42.     cout << ans;
  43. }
  44.  
  45. int main()
  46. {
  47.     ios_base::sync_with_stdio(0);
  48.     cin.tie(0);
  49.  
  50.     input();
  51.     solve();
  52. }
  53.  
Success #stdin #stdout 0.01s 5316KB
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https://ideone.com/KMmQST
language:
C++14 (gcc 8.3)
created:
4 days ago
visibility:
public

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