import java.util.*;
public class Main {
   public static void main(String[] args) {  
      Scanner sc = new Scanner(System.in);
      
      int N = sc.nextInt();
      
      int T = sc.nextInt();
      int A = sc.nextInt();
      
      int index = 1;
      double diff = 10000000000.0;
      for(int i = 0; i < N; i++) {
         int H = sc.nextInt();
         
         double d = Math.abs(A - (T - H * .006));
         if(d < diff) {
            diff = d;
            index = i+1;
         }
      }
      System.out.println(index);
   }
}
/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