import java.util.Scanner;

class Main {
    public static void main(final String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int t = scan.nextInt();
        int a = scan.nextInt();
        int[] h = new int[n];
        for (int i = 0; i < n; i++) {
            h[i] = scan.nextInt();
        }
        double min = Integer.MAX_VALUE;
        int ans = 0;
        for (int i = 0; i < n; i++) {
          double tem = (t-(h[i] * 0.006));
          if (min > Math.abs(tem - a)) {
              min = Math.abs(tem - a);
              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