import java.util.Scanner;
public class Main {
@SuppressWarnings("resource")
public static void main(String[] args) {
	Scanner sc =new Scanner(System.in);
	int placeNum=sc.nextInt();
	int temp=sc.nextInt();
	int ideal=sc.nextInt();
	int ans=0;
	double dis=10000;
	int placeHigh[]=new int[placeNum];
	for(int i=0;i<placeHigh.length;i++) {
		placeHigh[i]=sc.nextInt();
		if(dis>Math.abs(ideal-(temp-placeHigh[i]*0.006))) {
			dis=Math.abs(ideal-(temp-placeHigh[i]*0.006));
			ans=i+1;
		}
	}
	System.out.println(ans);

}
}
/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