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 ans = 100001.0;
    double bef;
    int answer = 0;
    for(int i=0; i<n; i++){
      bef = ans;
      ans = Math.min( ans,Math.abs( a-(t-sc.nextInt()*0.006) ) );
      if(bef != ans) answer = i+1;
    }
    System.out.println(answer);
  }
}
/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