#include <bits/stdc++.h>
using namespace std;
int main(){
    int N;
    cin >> N;
    long long A, B, X, Y;
    cin >> A >> B >> X >> Y;
    vector<long long> H(N);
    for(int i = 0; i < N; i++) cin >> H[i];
    long long ub = 1000000000, lb = -1;
    while(ub - lb > 1){
        int mid = (ub + lb) / 2;
        priority_queue<long long> q;
        for(int i = 0; i < N; i++) {
            if(H[i] > mid) q.push(H[i] - mid);
        }
        long long a = A;
        while(!q.empty() && a > 0){
            long long temp = q.top();
            q.pop();
            int cnt = min(temp / X, a);
            if(cnt == 0) cnt++;
            temp -= X * cnt;
            if(temp > 0) q.push(temp);
            a -= cnt;
        }
        long long sum = 0;
        while(!q.empty()){
            sum += q.top();
            q.pop();
        }
        if(sum <= B * Y) ub = mid;
        else lb = mid;
    }
    cout << ub << endl;
}