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();
        double min = 999;
        int minidx = 0;
        for (int i = 0; i < n; i++) {
            double sa = Math.abs(a-(t-sc.nextInt()*0.006));
            if (min > sa) {
                min = sa;
                minidx = i;
            }
        }
        System.out.println(minidx+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