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();
		}

		double bestTemp = Math.abs((t-h[0]*0.006) - a);
		int num = 1;

		for (int i = 1; i < n; i++) {
			if (Math.abs((t-h[i]*0.006) - a) < bestTemp) {
				bestTemp = Math.abs((t-h[i]*0.006) - a);
				num = i + 1;
			}
		}

		System.out.println(num);

	}
} 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();
		}

		double bestTemp = Math.abs((t-h[0]*0.006) - a);
		int num = 1;

		for (int i = 1; i < n; i++) {
			if (Math.abs((t-h[i]*0.006) - a) < bestTemp) {
				bestTemp = Math.abs((t-h[i]*0.006) - a);
				num = i + 1;
			}
		}

		System.out.println(num);

	}
} 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();
		}

		double bestTemp = Math.abs((t-h[0]*0.006) - a);
		int num = 1;

		for (int i = 1; i < n; i++) {
			if (Math.abs((t-h[i]*0.006) - a) < bestTemp) {
				bestTemp = Math.abs((t-h[i]*0.006) - a);
				num = i + 1;
			}
		}

		System.out.println(num);

	} 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();
		}

		double bestTemp = Math.abs((t-h[0]*0.006) - a);
		int num = 1;

		for (int i = 1; i < n; i++) {
			if (Math.abs((t-h[i]*0.006) - a) < bestTemp) {
				bestTemp = Math.abs((t-h[i]*0.006) - a);
				num = i + 1;
			}
		}

		System.out.println(num);

	} 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 bestTemp = Math.abs((t-h[0]*0.006) - a); bestTemp Math.abs((t-h[0]*0.006) - a) Math.abs Math (t-h[0]*0.006) - a (t-h[0]*0.006) t h[0]*0.006 h[0] h 0 0.006 a int num = 1; num 1 for (int i = 1; i < n; i++) {
			if (Math.abs((t-h[i]*0.006) - a) < bestTemp) {
				bestTemp = Math.abs((t-h[i]*0.006) - a);
				num = i + 1;
			}
		} int i = 1; int i = 1; i 1 i < n i n i++ i++ i {
			if (Math.abs((t-h[i]*0.006) - a) < bestTemp) {
				bestTemp = Math.abs((t-h[i]*0.006) - a);
				num = i + 1;
			}
		} {
			if (Math.abs((t-h[i]*0.006) - a) < bestTemp) {
				bestTemp = Math.abs((t-h[i]*0.006) - a);
				num = i + 1;
			}
		} if (Math.abs((t-h[i]*0.006) - a) < bestTemp) {
				bestTemp = Math.abs((t-h[i]*0.006) - a);
				num = i + 1;
			} Math.abs((t-h[i]*0.006) - a) < bestTemp Math.abs((t-h[i]*0.006) - a) Math.abs Math (t-h[i]*0.006) - a (t-h[i]*0.006) t h[i]*0.006 h[i] h i 0.006 a bestTemp {
				bestTemp = Math.abs((t-h[i]*0.006) - a);
				num = i + 1;
			} bestTemp = Math.abs((t-h[i]*0.006) - a) bestTemp Math.abs((t-h[i]*0.006) - a) Math.abs Math (t-h[i]*0.006) - a (t-h[i]*0.006) t h[i]*0.006 h[i] h i 0.006 a num = i + 1 num i + 1 i 1 System.out.println(num) System.out.println System.out System System.out num 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();
		}

		double bestTemp = Math.abs((t-h[0]*0.006) - a);
		int num = 1;

		for (int i = 1; i < n; i++) {
			if (Math.abs((t-h[i]*0.006) - a) < bestTemp) {
				bestTemp = Math.abs((t-h[i]*0.006) - a);
				num = i + 1;
			}
		}

		System.out.println(num);

	}
} 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();
		}

		double bestTemp = Math.abs((t-h[0]*0.006) - a);
		int num = 1;

		for (int i = 1; i < n; i++) {
			if (Math.abs((t-h[i]*0.006) - a) < bestTemp) {
				bestTemp = Math.abs((t-h[i]*0.006) - a);
				num = i + 1;
			}
		}

		System.out.println(num);

	}
} 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();
		}

		double bestTemp = Math.abs((t-h[0]*0.006) - a);
		int num = 1;

		for (int i = 1; i < n; i++) {
			if (Math.abs((t-h[i]*0.006) - a) < bestTemp) {
				bestTemp = Math.abs((t-h[i]*0.006) - a);
				num = i + 1;
			}
		}

		System.out.println(num);

	}
}