#include <bits/stdc++.h>
using namespace std;
int n,m,maxn,a[200000];
int main()
{
    int z=1,y;
    cin>>n;
    for(int i=1;i<=n;i++) cin>>a[i],y=max(y,a[i]);
    cin>>m;
    while(z<=y)
    {
        int x=z+(y-z)/2;
        int s=0;
        for(int i=1;i<=n;i++) s+=a[i]/x;
        if(s>=m) maxn=max(maxn,x),z=x+1;
        else y=x-1;
    }
    if(maxn==0) cout<<"Failed";
    else cout<<maxn;
    return 0;
}