import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int h[] = new int[n];
		int t = sc.nextInt();
		int a = sc.nextInt();
		double abs = 200;
		int ans = 0;
		double tmp;

		for (int i = 0; i < h.length; i++) {
			h[i] = sc.nextInt();
			tmp = Math.abs(a - (t - h[i]*0.006));
			if (i == 0) {
				abs = tmp;
				ans = 1;
			}else if (abs > tmp) {
				abs = tmp;
				ans = i + 1;
			}
		}
		sc.close();
		System.out.println(ans);

	}

} 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 h[] = new int[n];
		int t = sc.nextInt();
		int a = sc.nextInt();
		double abs = 200;
		int ans = 0;
		double tmp;

		for (int i = 0; i < h.length; i++) {
			h[i] = sc.nextInt();
			tmp = Math.abs(a - (t - h[i]*0.006));
			if (i == 0) {
				abs = tmp;
				ans = 1;
			}else if (abs > tmp) {
				abs = tmp;
				ans = i + 1;
			}
		}
		sc.close();
		System.out.println(ans);

	}

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int h[] = new int[n];
		int t = sc.nextInt();
		int a = sc.nextInt();
		double abs = 200;
		int ans = 0;
		double tmp;

		for (int i = 0; i < h.length; i++) {
			h[i] = sc.nextInt();
			tmp = Math.abs(a - (t - h[i]*0.006));
			if (i == 0) {
				abs = tmp;
				ans = 1;
			}else if (abs > tmp) {
				abs = tmp;
				ans = i + 1;
			}
		}
		sc.close();
		System.out.println(ans);

	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int h[] = new int[n];
		int t = sc.nextInt();
		int a = sc.nextInt();
		double abs = 200;
		int ans = 0;
		double tmp;

		for (int i = 0; i < h.length; i++) {
			h[i] = sc.nextInt();
			tmp = Math.abs(a - (t - h[i]*0.006));
			if (i == 0) {
				abs = tmp;
				ans = 1;
			}else if (abs > tmp) {
				abs = tmp;
				ans = i + 1;
			}
		}
		sc.close();
		System.out.println(ans);

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int h[] = new int[n]; h new int[n] n int t = sc.nextInt(); t sc.nextInt() sc.nextInt sc int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc double abs = 200; abs 200 int ans = 0; ans 0 double tmp; tmp for (int i = 0; i < h.length; i++) {
			h[i] = sc.nextInt();
			tmp = Math.abs(a - (t - h[i]*0.006));
			if (i == 0) {
				abs = tmp;
				ans = 1;
			}else if (abs > tmp) {
				abs = tmp;
				ans = i + 1;
			}
		} int i = 0; int i = 0; i 0 i < h.length i h.length h h.length i++ i++ i {
			h[i] = sc.nextInt();
			tmp = Math.abs(a - (t - h[i]*0.006));
			if (i == 0) {
				abs = tmp;
				ans = 1;
			}else if (abs > tmp) {
				abs = tmp;
				ans = i + 1;
			}
		} {
			h[i] = sc.nextInt();
			tmp = Math.abs(a - (t - h[i]*0.006));
			if (i == 0) {
				abs = tmp;
				ans = 1;
			}else if (abs > tmp) {
				abs = tmp;
				ans = i + 1;
			}
		} h[i] = sc.nextInt() h[i] h i sc.nextInt() sc.nextInt sc tmp = Math.abs(a - (t - h[i]*0.006)) tmp Math.abs(a - (t - h[i]*0.006)) Math.abs Math a - (t - h[i]*0.006) a (t - h[i]*0.006) t h[i]*0.006 h[i] h i 0.006 if (i == 0) {
				abs = tmp;
				ans = 1;
			}else if (abs > tmp) {
				abs = tmp;
				ans = i + 1;
			} i == 0 i 0 {
				abs = tmp;
				ans = 1;
			} abs = tmp abs tmp ans = 1 ans 1 if (abs > tmp) {
				abs = tmp;
				ans = i + 1;
			} abs > tmp abs tmp {
				abs = tmp;
				ans = i + 1;
			} abs = tmp abs tmp ans = i + 1 ans i + 1 i 1 sc.close() sc.close sc 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) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int h[] = new int[n];
		int t = sc.nextInt();
		int a = sc.nextInt();
		double abs = 200;
		int ans = 0;
		double tmp;

		for (int i = 0; i < h.length; i++) {
			h[i] = sc.nextInt();
			tmp = Math.abs(a - (t - h[i]*0.006));
			if (i == 0) {
				abs = tmp;
				ans = 1;
			}else if (abs > tmp) {
				abs = tmp;
				ans = i + 1;
			}
		}
		sc.close();
		System.out.println(ans);

	}

} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int h[] = new int[n];
		int t = sc.nextInt();
		int a = sc.nextInt();
		double abs = 200;
		int ans = 0;
		double tmp;

		for (int i = 0; i < h.length; i++) {
			h[i] = sc.nextInt();
			tmp = Math.abs(a - (t - h[i]*0.006));
			if (i == 0) {
				abs = tmp;
				ans = 1;
			}else if (abs > tmp) {
				abs = tmp;
				ans = i + 1;
			}
		}
		sc.close();
		System.out.println(ans);

	}

} 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 h[] = new int[n];
		int t = sc.nextInt();
		int a = sc.nextInt();
		double abs = 200;
		int ans = 0;
		double tmp;

		for (int i = 0; i < h.length; i++) {
			h[i] = sc.nextInt();
			tmp = Math.abs(a - (t - h[i]*0.006));
			if (i == 0) {
				abs = tmp;
				ans = 1;
			}else if (abs > tmp) {
				abs = tmp;
				ans = i + 1;
			}
		}
		sc.close();
		System.out.println(ans);

	}

}
