#include<bits/stdc++.h>
using namespace std;

#define rep(i,x,y) for(int i=x;i<y;i++)
#define repr(i,x,y) for(int i=x;i>=y;i--)
#define int long long
#define pb push_back
#define ff first
#define ss second
#define sz(x) ((int)x.size())
#define all(x) begin(x), end(x)
#define memo(x,y) memset((x),(y),sizeof((x)))
#define line cout<<"[At "<<__LINE__<<"]"<<endl;

using pii = pair<int,int>;
using vi = vector<int>;
using vii = vector<pair<int,int>>;

constexpr int mod = 1e9 + 7 , N = 2e5 + 5;
constexpr long long inf = 1e18;
constexpr long double eps = 1e-6;

void Onigiri()
{
  int n,x,y;
  cin>>n>>x>>y;
  int c[n];
  rep(i,0,n){
    cin>>c[i];
  }

  int l=0,r=1e9,ans=-1;
  while(l<=r){
    int m=(l+r)/2;
    int cnt=m;
    for(int i=0;i<n;i++){
      if(c[i]>y*m){
        cnt-=(c[i]-y*m+x-y-1)/(x-y);
      }
    }
    if(cnt>=0){
      ans=m;
      r=m-1;
    }else l=m+1;
  }
  cout<<ans;
}
signed main()
{
   ios_base::sync_with_stdio(false);cin.tie(NULL);
   //cout.precision(10);cout<<fixed;
   #ifdef Zoro
   freopen("/home/pritish/Competitive/in", "r", stdin);
   freopen("/home/pritish/Competitive/out", "w", stdout);
   #endif

   int t=1;
   cin>>t;
   while(t--)
   {Onigiri();cout<<"\n";}

   cerr<<"\n"<<(float)clock()/CLOCKS_PER_SEC*1000<<" ms"<<endl;
   return 0;
}