#include <iostream>

 #include <vector>

 using namespace std;

 int main(){

     int m,sum = ;

     cin >> m ;

     vector<int> c(m+,);

     for(int i = ; i <= m ; ++ i) {cin >> c[i];sum+=c[i];}

     int x,y,firstPart = , secondPart = ,firstIndex = , secondIndex =;

     cin >>  x >>  y;

     for(firstIndex = ,secondIndex = m+;firstIndex < secondIndex;){

         if (firstPart < x) firstPart+=c[++firstIndex];

         if (secondPart < x) secondPart += c[--secondIndex];

         if( firstPart >= x && secondPart >= x ) break;

     }

     if(firstPart > y || secondPart > y) cout<<<<endl;

     else{

         if(firstIndex >= secondIndex) cout<<<<endl;

         else{

             if(sum - firstPart - secondPart > *(y-x)) cout<<<<endl;

             else{

                 while(secondPart + c[secondIndex-]<= y && (secondIndex-) > firstIndex){

                     secondIndex--;

                     secondPart+=c[secondIndex];

                 }

                 if (secondIndex- <= firstIndex) cout<<secondIndex<<endl;

                 else{

                     if(sum - secondPart > y) cout<<<<endl;

                     else cout<<secondIndex<<endl;

                 }

             }

         }

     }

 }