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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long
  4. ll t,n,x,s,d,T;
  5. int main(){
  6.     freopen("CANDY.INP","r",stdin);
  7.     freopen("CANDY.OUT","w",stdout);
  8.     cin >> t;
  9.     for(ll i=1 ; i<=t ; i++){
  10.         cin >> n >> x;
  11.         vector <ll> a(n+1);
  12.         s=x;
  13.         for(ll i=1 ; i<=n ; i++){
  14.             cin >> a[i];
  15.             s+=a[i];
  16.         }
  17.         d=0;
  18.         T=s/(n+1);
  19.         for(ll i=1 ; i<=n ; i++){
  20.             if(a[i]<T){
  21.                 d+=(T-a[i]);
  22.             }
  23.         }
  24.         if(s%(n+1)==0 && x-d==T){
  25.             cout <<"YES" << endl;
  26.         }
  27.         else{
  28.             cout <<"NO" << endl;
  29.         }
  30.     }
  31. }
  32.  
Success #stdin #stdout 0.01s 5284KB
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https://ideone.com/kb1js2
language:
C++ (gcc 8.3)
created:
7 days ago
visibility:
public

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