import java.util.Scanner;
public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		double a = sc.nextInt();
		double b = sc.nextInt();
		double c = sc.nextInt();
		double f =9999;
		int g = 0;
		for(int i = 1; i <= a; i++){
			double d = sc.nextInt();
			double e = b-d*0.006;
			if(f>Math.abs(c-e)){
				f = Math.abs(c-e);
				g = i;
			}
		}
		System.out.println(g);
	}
}
/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