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  1. #include <algorithm>
  2. #include <iomanip>
  3. #include <iostream>
  4. #include <vector>
  5. #include <set>
  6. #include <numeric>
  7. #include <map>
  8. #include <unordered_map>
  9. #include <stack>
  10. #include <queue>
  11. using namespace std;
  12. #define all(a) a.begin(), a.end()
  13. #define ll long long
  14. #define fo(i,n) for (long long i = 0; i < n; i++)
  15. #define pb push_back
  16. int main()
  17. {
  18.     ll a,b,c,d,n,m,k,input,i;
  19.     ios_base::sync_with_stdio(false);
  20.     string sinput;
  21.     cin.tie(0); cout.tie(0);
  22.     cin >> i;
  23.     while (i--)
  24.     {
  25.         cin >> n >> a;
  26.         if (n > 1 && n%2 == 1)
  27.         {
  28.         	cout << "NO" << '\n';
  29.         	continue;
  30.         }
  31.         vector<ll> arr;
  32.         ll sum = 0;
  33.         fo(j,n)
  34.         {
  35.             cin >> input;
  36.             sum+=input;
  37.         }
  38.         if (sum/n == a)
  39.         {
  40.             cout << "YES" << '\n';
  41.         }
  42.         else
  43.         {
  44.             cout << "NO" << '\n';
  45.         }
  46.     }
  47. }
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/Ok7zFV
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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