#include<cstdio>

 #include<cmath>

 #include<cstring>

 #define du 0.003141593

 #define g 9.8

 #define eps 0.0000001

 using namespace std;

 int ans,n;

 double dan[],h,l1,r1,l2,r2;

 void go()

 {

     double alph,vx,vy,xx;

     for(int j=;j<=;j++)

     {

         alph=(double)j*du;

         int cnt=;

         for(int i=;i<n;i++)

         {

             vx=dan[i]*sin(alph);

             vy=dan[i]*cos(alph);

             xx=((sqrt(vy*vy+2.0*g*h)-vy)/g)*vx;

             if(xx>l2-eps&&xx<r2+eps){cnt=;break;}

             if(xx>l1-eps&&xx<r1+eps)

                 cnt++;

         }

         if(ans<cnt)ans=cnt;

     }

 }

 int main()

 {

     while(scanf("%d",&n)&&n)

     {

         memset(dan,,sizeof dan);

         ans=;

         scanf("%lf",&h);

         scanf("%lf%lf%lf%lf",&l1,&r1,&l2,&r2);

         for(int i=;i<n;i++)

             scanf("%lf",&dan[i]);

         go();

         printf("%d\n",ans);

     }

     return ;

 }