import java.util.*;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        double t = sc.nextInt();
        double a = sc.nextInt();
        int[] h = new int[n];
        for(int i = 0; i < n; i++){
            h[i] = sc.nextInt();
        }
        int plan = 0;
        double sub = 0.0;
        double temp = 0;
        double minsub = 100000.0;
        for(int i = 0; i < n; i++){
            temp =  t - h[i] * 0.006;
            sub = Math.abs(a - temp);
            if(sub < minsub){
                minsub = sub;
                plan = i+1;
            }
        }
        System.out.print(plan);
    }
}
/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