import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		int N = stdIn.nextInt();
		int T = stdIn.nextInt();
		int A = stdIn.nextInt();
		double[] H = new double[N];
		H[0] = Math.abs(T - stdIn.nextDouble()*0.006 - A);
		double min = H[0];
		int ans = 0;
		for(int i = 1; i < N; i++) {
			H[i] = Math.abs(T - stdIn.nextDouble()*0.006 - A);
			if(H[i] < min) {
				min = H[i];
				ans = i;
			}
		}
		System.out.println(ans+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