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 ansDiff = 1000000;
		int ansNum = 0;
		for(int i = 0; i < n; i++) {
			double diff = Math.abs(t - h[i] * 0.006 - a);
			if(diff < ansDiff) {
				ansDiff = diff;
				ansNum = i +1;
			}
		}
		System.out.println(ansNum);
	}
} 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 ansDiff = 1000000;
		int ansNum = 0;
		for(int i = 0; i < n; i++) {
			double diff = Math.abs(t - h[i] * 0.006 - a);
			if(diff < ansDiff) {
				ansDiff = diff;
				ansNum = i +1;
			}
		}
		System.out.println(ansNum);
	}
} 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 ansDiff = 1000000;
		int ansNum = 0;
		for(int i = 0; i < n; i++) {
			double diff = Math.abs(t - h[i] * 0.006 - a);
			if(diff < ansDiff) {
				ansDiff = diff;
				ansNum = i +1;
			}
		}
		System.out.println(ansNum);
	} 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 ansDiff = 1000000;
		int ansNum = 0;
		for(int i = 0; i < n; i++) {
			double diff = Math.abs(t - h[i] * 0.006 - a);
			if(diff < ansDiff) {
				ansDiff = diff;
				ansNum = i +1;
			}
		}
		System.out.println(ansNum);
	} 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 ansDiff = 1000000; ansDiff 1000000 int ansNum = 0; ansNum 0 for(int i = 0; i < n; i++) {
			double diff = Math.abs(t - h[i] * 0.006 - a);
			if(diff < ansDiff) {
				ansDiff = diff;
				ansNum = i +1;
			}
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			double diff = Math.abs(t - h[i] * 0.006 - a);
			if(diff < ansDiff) {
				ansDiff = diff;
				ansNum = i +1;
			}
		} {
			double diff = Math.abs(t - h[i] * 0.006 - a);
			if(diff < ansDiff) {
				ansDiff = diff;
				ansNum = i +1;
			}
		} double diff = Math.abs(t - h[i] * 0.006 - a); diff Math.abs(t - h[i] * 0.006 - a) Math.abs Math t - h[i] * 0.006 - a t - h[i] * 0.006 - a t h[i] * 0.006 h[i] h i 0.006 a if(diff < ansDiff) {
				ansDiff = diff;
				ansNum = i +1;
			} diff < ansDiff diff ansDiff {
				ansDiff = diff;
				ansNum = i +1;
			} ansDiff = diff ansDiff diff ansNum = i +1 ansNum i +1 i 1 System.out.println(ansNum) System.out.println System.out System System.out ansNum 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 ansDiff = 1000000;
		int ansNum = 0;
		for(int i = 0; i < n; i++) {
			double diff = Math.abs(t - h[i] * 0.006 - a);
			if(diff < ansDiff) {
				ansDiff = diff;
				ansNum = i +1;
			}
		}
		System.out.println(ansNum);
	}
} 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 ansDiff = 1000000;
		int ansNum = 0;
		for(int i = 0; i < n; i++) {
			double diff = Math.abs(t - h[i] * 0.006 - a);
			if(diff < ansDiff) {
				ansDiff = diff;
				ansNum = i +1;
			}
		}
		System.out.println(ansNum);
	}
} 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 ansDiff = 1000000;
		int ansNum = 0;
		for(int i = 0; i < n; i++) {
			double diff = Math.abs(t - h[i] * 0.006 - a);
			if(diff < ansDiff) {
				ansDiff = diff;
				ansNum = i +1;
			}
		}
		System.out.println(ansNum);
	}
}