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  1. #include<bits/stdc++.h>
  2. #define ll long long
  3. using namespace std;
  4. int n;
  5. void solve()
  6. {
  7.     cin>>n;
  8.     int ans = 0;
  9.     for(int i=1; i<=n; i++)
  10.         for(int j=i; j<=n; j++)
  11.             if(__gcd(i, n)*__gcd(j, n) == __gcd(i*j, n))
  12.                 ans++;
  13.     cout<<ans<<'\n';
  14. }
  15. signed main()
  16. {
  17.     ios_base::sync_with_stdio(0);
  18.     cin.tie(0); cout.tie(0);
  19.     int tt;
  20.     cin>>tt;
  21.     while(tt--) solve();
  22.     return 0;
  23. }
  24.  
Success #stdin #stdout 0.01s 5304KB
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https://ideone.com/YxS3TK
language:
C++14 (gcc 8.3)
created:
110 days ago
visibility:
secret

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