import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
      int a=sc.nextInt();int b=sc.nextInt();
      int p=1;
      double pd=-0.006*sc.nextInt()+a;
      for(int i=0;i<n-1;i++){
        double po=-0.006*sc.nextInt()+a;
        if(Math.abs(po-b)<Math.abs(pd-b)){
        	p=i+2;
            pd=po;
        }
      }
      System.out.println(p);
    }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz