import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int t = sc.nextInt();
        int a = sc.nextInt();
        int[] h = new int[n];
        for (int i = 0 ; i < n ; i++) {
            h[i] = sc.nextInt();
        }
        double min = Double.MAX_VALUE;
        int ans = 0;
        for (int i = 0 ; i < n ; i++) {
           if (min > Math.abs(a - (t - 0.006 * h[i]))) {
               ans = i + 1;
               min = Math.abs(a - (t - 0.006 * h[i]));
           }
        }
        System.out.println(ans);
    }

} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int t = sc.nextInt();
        int a = sc.nextInt();
        int[] h = new int[n];
        for (int i = 0 ; i < n ; i++) {
            h[i] = sc.nextInt();
        }
        double min = Double.MAX_VALUE;
        int ans = 0;
        for (int i = 0 ; i < n ; i++) {
           if (min > Math.abs(a - (t - 0.006 * h[i]))) {
               ans = i + 1;
               min = Math.abs(a - (t - 0.006 * h[i]));
           }
        }
        System.out.println(ans);
    }

} Main public static void main(String[] args) {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int t = sc.nextInt();
        int a = sc.nextInt();
        int[] h = new int[n];
        for (int i = 0 ; i < n ; i++) {
            h[i] = sc.nextInt();
        }
        double min = Double.MAX_VALUE;
        int ans = 0;
        for (int i = 0 ; i < n ; i++) {
           if (min > Math.abs(a - (t - 0.006 * h[i]))) {
               ans = i + 1;
               min = Math.abs(a - (t - 0.006 * h[i]));
           }
        }
        System.out.println(ans);
    } main {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int t = sc.nextInt();
        int a = sc.nextInt();
        int[] h = new int[n];
        for (int i = 0 ; i < n ; i++) {
            h[i] = sc.nextInt();
        }
        double min = Double.MAX_VALUE;
        int ans = 0;
        for (int i = 0 ; i < n ; i++) {
           if (min > Math.abs(a - (t - 0.006 * h[i]))) {
               ans = i + 1;
               min = Math.abs(a - (t - 0.006 * h[i]));
           }
        }
        System.out.println(ans);
    } @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int t = sc.nextInt(); t sc.nextInt() sc.nextInt sc int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int[] h = new int[n]; h new int[n] n for (int i = 0 ; i < n ; i++) {
            h[i] = sc.nextInt();
        } int i = 0 ; int i = 0 ; i 0 i < n i n i++ i++ i {
            h[i] = sc.nextInt();
        } {
            h[i] = sc.nextInt();
        } h[i] = sc.nextInt() h[i] h i sc.nextInt() sc.nextInt sc double min = Double.MAX_VALUE; min Double.MAX_VALUE Double Double.MAX_VALUE int ans = 0; ans 0 for (int i = 0 ; i < n ; i++) {
           if (min > Math.abs(a - (t - 0.006 * h[i]))) {
               ans = i + 1;
               min = Math.abs(a - (t - 0.006 * h[i]));
           }
        } int i = 0 ; int i = 0 ; i 0 i < n i n i++ i++ i {
           if (min > Math.abs(a - (t - 0.006 * h[i]))) {
               ans = i + 1;
               min = Math.abs(a - (t - 0.006 * h[i]));
           }
        } {
           if (min > Math.abs(a - (t - 0.006 * h[i]))) {
               ans = i + 1;
               min = Math.abs(a - (t - 0.006 * h[i]));
           }
        } if (min > Math.abs(a - (t - 0.006 * h[i]))) {
               ans = i + 1;
               min = Math.abs(a - (t - 0.006 * h[i]));
           } min > Math.abs(a - (t - 0.006 * h[i])) min Math.abs(a - (t - 0.006 * h[i])) Math.abs Math a - (t - 0.006 * h[i]) a (t - 0.006 * h[i]) t 0.006 * h[i] 0.006 h[i] h i {
               ans = i + 1;
               min = Math.abs(a - (t - 0.006 * h[i]));
           } ans = i + 1 ans i + 1 i 1 min = Math.abs(a - (t - 0.006 * h[i])) min Math.abs(a - (t - 0.006 * h[i])) Math.abs Math a - (t - 0.006 * h[i]) a (t - 0.006 * h[i]) t 0.006 * h[i] 0.006 h[i] h i System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {

    public static void main(String[] args) {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int t = sc.nextInt();
        int a = sc.nextInt();
        int[] h = new int[n];
        for (int i = 0 ; i < n ; i++) {
            h[i] = sc.nextInt();
        }
        double min = Double.MAX_VALUE;
        int ans = 0;
        for (int i = 0 ; i < n ; i++) {
           if (min > Math.abs(a - (t - 0.006 * h[i]))) {
               ans = i + 1;
               min = Math.abs(a - (t - 0.006 * h[i]));
           }
        }
        System.out.println(ans);
    }

} public class Main {

    public static void main(String[] args) {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int t = sc.nextInt();
        int a = sc.nextInt();
        int[] h = new int[n];
        for (int i = 0 ; i < n ; i++) {
            h[i] = sc.nextInt();
        }
        double min = Double.MAX_VALUE;
        int ans = 0;
        for (int i = 0 ; i < n ; i++) {
           if (min > Math.abs(a - (t - 0.006 * h[i]))) {
               ans = i + 1;
               min = Math.abs(a - (t - 0.006 * h[i]));
           }
        }
        System.out.println(ans);
    }

} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int t = sc.nextInt();
        int a = sc.nextInt();
        int[] h = new int[n];
        for (int i = 0 ; i < n ; i++) {
            h[i] = sc.nextInt();
        }
        double min = Double.MAX_VALUE;
        int ans = 0;
        for (int i = 0 ; i < n ; i++) {
           if (min > Math.abs(a - (t - 0.006 * h[i]))) {
               ans = i + 1;
               min = Math.abs(a - (t - 0.006 * h[i]));
           }
        }
        System.out.println(ans);
    }

}
