#include<stdio.h>

int main(){
	int n,i;
	long x,y,d,dmax=0,ans=0;
	scanf("%d",&n);
	for(i=0;i<n;i++){
		scanf("%ld",&d);
		dmax=(dmax<d)?d:dmax;
	}
	scanf("%ld %ld",&x,&y);
	x=(x<0)?-1*x:x;
	y=(y<0)?-1*y:y;
	d=(x>y)?x:y;
	if(d>dmax*2){
		ans+=(d-dmax-1)/dmax;
		d-=dmax*ans;
	}
	printf("%ld\n",ans+((d==dmax)?1:2));
	return 0;
}