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  1. #include <iostream>
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4.  
  5. #define ll long long
  6. #define fastt ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
  7. #define sp " "
  8. #define pb push_back
  9. #define all(x) x.begin(),x.end()
  10. #define ff first
  11. #define ss second
  12. #define nl  "\n"
  13.  
  14. void solve()
  15. {
  16.     ll n, k, x;
  17.     cin>>n>>k;
  18.  
  19.     vector<ll>v(n);
  20.     for(ll i=0; i<n; i++)
  21.     {
  22.         cin>>x;
  23.         v[i] = x % k;
  24.     }
  25.  
  26.     map<ll,ll>freq;
  27.     for(ll i=0; i<n; i++)
  28.     {
  29.         cin>>x;
  30.         freq[x%k]++;
  31.     }
  32.  
  33.     /// x = 2 k = 5 then x+k=7 x - k = 3; x%k = 2, (x+k) %k = 2 [similar to x%k], (x-k)%k = 3[did abs thus val changes, similar to k - (x%k)]
  34.     /// So need to Check 2 condition, i) is v[i]%k is present or ii) is k - (v[i]%k) is present
  35.  
  36.     for(ll i=0; i<n; i++)
  37.     {
  38.         if(freq[v[i]]) freq[v[i]]--;
  39.         else
  40.         {
  41.             x = k - v[i];
  42.             if(freq[x]) freq[x]--;
  43.             else
  44.             {
  45.                 cout<<"NO"<<endl;
  46.                 return;
  47.             }
  48.         }
  49.     }
  50.  
  51.     for(auto &it : freq)
  52.     {
  53.         /// cout<<it.ff<<sp<<it.ss<<endl;
  54.         if(it.ss != 0)
  55.         {
  56.             cout<<"NO"<<endl;
  57.             return;
  58.         }
  59.     }
  60.  
  61.     cout<<"YES"<<endl;
  62. }
  63.  
  64. int main()
  65. {
  66.     ll t = 1;
  67.     cin>>t;
  68.     while(t--)
  69.     {
  70.         solve();
  71.     }
  72.     return 0;
  73. }
  74.  
Success #stdin #stdout 0s 5312KB
comments (?)
stdin 
Standard input is empty
stdout 
YES
https://ideone.com/k2QDd7
language:
C++14 (gcc 8.3)
created:
239 days ago
visibility:
secret

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