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[] H = new int[N];
    double min = 100000L;
    int ansIndex = -1;
    for(int i = 0; i < N; i++){
      H[i] = sc.nextInt();
      double tmp = Math.abs(A - T + H[i] * 0.006);
      if(min > tmp){
        min = tmp;
        ansIndex = i;
      }
    }
    System.out.println(ansIndex + 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