#include<bits/stdc++.h>
using namespace std;
using ll = long long;
int main(){
    int n;
    ll a,b,x,y;
    cin>>n>>a>>b>>x>>y;
    vector<ll> h(n);
    for(int i = 0;i<n;i++) cin>>h[i];
    ll l = -1;
    ll r = 1e9;
    while(r-l>1){
        ll mid = (r+l) / 2;
        vector<ll> now(n);
        for(int i = 0;i<n;i++) now[i] = max(0LL,h[i]-mid);
        ll ra = a,rb = b;
        ll cnt = 0;
        for(int i = 0;i<n;i++){
            ll want = now[i] / x;
            if(want+cnt<=a){
                now[i] -= x * want;
                cnt += want;
            }else{
                ll can = a - cnt;
                now[i] -= x * can;
                cnt += can;
            }
        }
        sort(now.begin(),now.end());
        reverse(now.begin(),now.end());
        for(int i = 0;i<n;i++){
            if(now[i]!=0&&cnt+1<=a){
                cnt++;
                now[i] = 0;
            }
        }
        ll rest = b * y;
        for(int i = 0;i<n;i++){
            ll can = min(now[i],rest);
            now[i] -= can;
            rest -= can;
        }
        bool p = true;
        for(int i = 0;i<n;i++) if(now[i]!=0) p = false;
        if(p) r = mid;
        else l = mid;
    }
    cout<<r<<endl;
}