#include<cstdio>
#include<cstring>
#include<iostream>
#include<cmath>
#include<ctime>
#include<string>
#include<algorithm>
#include<vector>
#include<queue>
#include<stack>
#include<map>
using namespace std;
typedef long long LL;
const int MR=1e5+10;
int n,A,B,X,Y,h[MR];
int b[MR];
bool cmp(int x,int y){
    return x%X>y%X;
}
bool check(int k){
    int a=A;
    LL sum=0;
    int cnt=0;
    for(int i=1;i<=n;i++){
        if(h[i]<=k) continue;
        cnt++;
        b[cnt]=h[i]-k;
    }
    sort(b+1,b+cnt+1,cmp);
    for(int i=1;i<=cnt;i++){
        if(a>=b[i]/X){
            a-=b[i]/X;
            b[i]%=X;
        }
        else if(a>0){
            b[i]-=a*X;
            a=0;
            break;
        }
    }
    for(int i=a+1;i<=cnt;i++){
        sum+=b[i];
    }
    return sum<=1ll*B*Y;
}

int main(){
    cin>>n>>A>>B>>X>>Y;
    for(int i=1;i<=n;i++){
        cin>>h[i];
    }
    int l=-1,r=1e9+10;
    while(l+1<r){
        int mid=(l+r)/2;
        if(check(mid)){
            r=mid;
        }
        else{
            l=mid;
        }
    }
    cout<<r<<endl;
    return 0;
}