
import java.util.*;

public class Main {
  public static void main(String[] args) {
    @SuppressWarnings("resource")
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    double T = sc.nextDouble();
    int A = sc.nextInt();
    int ans = 0;//平均気温がA度に最も近い地点
    double min = Double.MAX_VALUE;// ↑の値

    for (int i = 0; i < N; i++) {
      double tmp = T - sc.nextDouble() * 0.006;
      double t = Math.abs(A - tmp);
      if(t < min) {
        ans = i+1;
        min = t;
      }
    }
    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