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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4. using ll = long long;
  5.  
  6. int main()
  7. {
  8.     ll t;
  9.     cin >> t;
  10.     while (t--)
  11.     {
  12.         int n, x = 0, y = 0;
  13.         ll k,ans=0;
  14.         cin >> n >> k;
  15.         map<int, int> m;
  16.         for (ll i = 0; i < n; i++)
  17.         {
  18.             int z;
  19.             cin >> z;
  20.             if(z%k)
  21.             m[k - z % k]++;
  22.         }
  23.         if(m.size()==0){
  24.         	cout<<"0\n";
  25.         	continue;
  26.         }
  27.        for(auto &x:m){
  28.        	  ans=max(ans,(x.second-1)*k+x.first);
  29.        }
  30.         cout << ans+1 << endl;
  31.     }
  32. }
Runtime error #stdin #stdout 0s 4188KB
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https://ideone.com/XFVuey
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
public

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