#include<stdio.h>

#define MIN(a,b) ((a)<(b)?(a):(b))

void run(void){
  int n;
  scanf("%d",&n);
  int d[15];
  int i;
  for(i=0;i<n;i++){
    scanf("%d",d+i);
  }
  int x,y;
  scanf("%d%d",&x,&y);
  x=(x>0?x:-x);
  y=(y>0?y:-y);

  if(x==0 && y==0){
    printf("0\n");
    return;
  }

  int min=1000000000;
  for(i=0;i<n;i++){
    int t=d[i];
    if(x<=t && y<=t){
      min=MIN(min,(x==t || y==t?1:2));
    } else if(x==y){
      min=MIN(min,x/t+(x%t!=0));
    } else {
      int z=x+y-MIN(x,y);
      min=MIN(min,(z+t-1)/t);
    }
  }
  printf("%d\n",min);
  return;
}

int main(void){
  run();
  return 0;
}