
import java.util.Scanner;

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();
        int[] H = new int[N];
        for (int i = 0 ; i< N ; i++) {
            H[i] = sc.nextInt();
        }
        int index = 0;
        double minDiff = 10000;
        for (int i = 0 ; i < N ; i++) {
            double diff = Math.abs(T - 0.006 * H[i] - A);
            if (diff < minDiff) {
                minDiff = diff;
                index = i;
            }
        }
        System.out.println(index + 1);
    }

} import java.util.Scanner; Scanner 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();
        int[] H = new int[N];
        for (int i = 0 ; i< N ; i++) {
            H[i] = sc.nextInt();
        }
        int index = 0;
        double minDiff = 10000;
        for (int i = 0 ; i < N ; i++) {
            double diff = Math.abs(T - 0.006 * H[i] - A);
            if (diff < minDiff) {
                minDiff = diff;
                index = i;
            }
        }
        System.out.println(index + 1);
    }

} 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();
        int[] H = new int[N];
        for (int i = 0 ; i< N ; i++) {
            H[i] = sc.nextInt();
        }
        int index = 0;
        double minDiff = 10000;
        for (int i = 0 ; i < N ; i++) {
            double diff = Math.abs(T - 0.006 * H[i] - A);
            if (diff < minDiff) {
                minDiff = diff;
                index = i;
            }
        }
        System.out.println(index + 1);
    } main {
        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();
        }
        int index = 0;
        double minDiff = 10000;
        for (int i = 0 ; i < N ; i++) {
            double diff = Math.abs(T - 0.006 * H[i] - A);
            if (diff < minDiff) {
                minDiff = diff;
                index = i;
            }
        }
        System.out.println(index + 1);
    } 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 int index = 0; index 0 double minDiff = 10000; minDiff 10000 for (int i = 0 ; i < N ; i++) {
            double diff = Math.abs(T - 0.006 * H[i] - A);
            if (diff < minDiff) {
                minDiff = diff;
                index = i;
            }
        } int i = 0 ; int i = 0 ; i 0 i < N i N i++ i++ i {
            double diff = Math.abs(T - 0.006 * H[i] - A);
            if (diff < minDiff) {
                minDiff = diff;
                index = i;
            }
        } {
            double diff = Math.abs(T - 0.006 * H[i] - A);
            if (diff < minDiff) {
                minDiff = diff;
                index = i;
            }
        } double diff = Math.abs(T - 0.006 * H[i] - A); diff Math.abs(T - 0.006 * H[i] - A) Math.abs Math T - 0.006 * H[i] - A T - 0.006 * H[i] - A T 0.006 * H[i] 0.006 H[i] H i A if (diff < minDiff) {
                minDiff = diff;
                index = i;
            } diff < minDiff diff minDiff {
                minDiff = diff;
                index = i;
            } minDiff = diff minDiff diff index = i index i System.out.println(index + 1) System.out.println System.out System System.out index + 1 index 1 String[] args args 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();
        int[] H = new int[N];
        for (int i = 0 ; i< N ; i++) {
            H[i] = sc.nextInt();
        }
        int index = 0;
        double minDiff = 10000;
        for (int i = 0 ; i < N ; i++) {
            double diff = Math.abs(T - 0.006 * H[i] - A);
            if (diff < minDiff) {
                minDiff = diff;
                index = i;
            }
        }
        System.out.println(index + 1);
    }

} 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();
        int[] H = new int[N];
        for (int i = 0 ; i< N ; i++) {
            H[i] = sc.nextInt();
        }
        int index = 0;
        double minDiff = 10000;
        for (int i = 0 ; i < N ; i++) {
            double diff = Math.abs(T - 0.006 * H[i] - A);
            if (diff < minDiff) {
                minDiff = diff;
                index = i;
            }
        }
        System.out.println(index + 1);
    }

} Main

import java.util.Scanner;

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();
        int[] H = new int[N];
        for (int i = 0 ; i< N ; i++) {
            H[i] = sc.nextInt();
        }
        int index = 0;
        double minDiff = 10000;
        for (int i = 0 ; i < N ; i++) {
            double diff = Math.abs(T - 0.006 * H[i] - A);
            if (diff < minDiff) {
                minDiff = diff;
                index = i;
            }
        }
        System.out.println(index + 1);
    }

}