import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n =sc.nextInt();
    double t = sc.nextDouble();
    double a = sc.nextDouble();
    double h[] = new double[n];
    double dist[] = new double[n];
    int answer =0;
    double tmp=10000000;
    for(int i=0;i<n;i++){
      h[i]=sc.nextDouble();
    }
    for(int i=0;i<n;i++){
      dist[i]=Math.abs(a-(t-h[i]*0.006));
    }
    for(int i=0;i<n;i++){
      if(tmp>dist[i]){
        answer =i;
        tmp=dist[i];
      }
    }
    System.out.println(answer+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