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();
      double[] h = new double[n];
      for(int i=0;i<n;i++){
        h[i] = sc.nextInt();
      }
      int kokonishirowotateyou = 0;
      double gosa = 10000;
      for(int i=0;i<n;i++){
        h[i] = t-(h[i]*0.006);
        h[i] = Math.abs(h[i]-a);
        if(gosa>h[i]){
          kokonishirowotateyou = i;
          gosa = h[i];
        }
      }
      System.out.println(kokonishirowotateyou+1);
    }
}
/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