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];
		int index = 0;
		double abs = Double.MAX_VALUE;
		for(int i = 0; i <n; i++) {
			h[i] = sc.nextInt();
		}
		for(int i = 0; i < n; i++) {
			double temp =Math.abs(a-(t-(h[i]*0.006)));
			if(temp < abs) {
				abs = temp;
				index = i+1;
			}
		}
		System.out.println(index);
	}
} 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];
		int index = 0;
		double abs = Double.MAX_VALUE;
		for(int i = 0; i <n; i++) {
			h[i] = sc.nextInt();
		}
		for(int i = 0; i < n; i++) {
			double temp =Math.abs(a-(t-(h[i]*0.006)));
			if(temp < abs) {
				abs = temp;
				index = i+1;
			}
		}
		System.out.println(index);
	}
} 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];
		int index = 0;
		double abs = Double.MAX_VALUE;
		for(int i = 0; i <n; i++) {
			h[i] = sc.nextInt();
		}
		for(int i = 0; i < n; i++) {
			double temp =Math.abs(a-(t-(h[i]*0.006)));
			if(temp < abs) {
				abs = temp;
				index = i+1;
			}
		}
		System.out.println(index);
	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int t = sc.nextInt();
		int a = sc.nextInt();
		int[] h = new int[n];
		int index = 0;
		double abs = Double.MAX_VALUE;
		for(int i = 0; i <n; i++) {
			h[i] = sc.nextInt();
		}
		for(int i = 0; i < n; i++) {
			double temp =Math.abs(a-(t-(h[i]*0.006)));
			if(temp < abs) {
				abs = temp;
				index = i+1;
			}
		}
		System.out.println(index);
	} 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 int index = 0; index 0 double abs = Double.MAX_VALUE; abs Double.MAX_VALUE Double Double.MAX_VALUE 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 for(int i = 0; i < n; i++) {
			double temp =Math.abs(a-(t-(h[i]*0.006)));
			if(temp < abs) {
				abs = temp;
				index = i+1;
			}
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			double temp =Math.abs(a-(t-(h[i]*0.006)));
			if(temp < abs) {
				abs = temp;
				index = i+1;
			}
		} {
			double temp =Math.abs(a-(t-(h[i]*0.006)));
			if(temp < abs) {
				abs = temp;
				index = i+1;
			}
		} double temp =Math.abs(a-(t-(h[i]*0.006))); temp 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(temp < abs) {
				abs = temp;
				index = i+1;
			} temp < abs temp abs {
				abs = temp;
				index = i+1;
			} abs = temp abs temp index = i+1 index i+1 i 1 System.out.println(index) System.out.println System.out System System.out index 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];
		int index = 0;
		double abs = Double.MAX_VALUE;
		for(int i = 0; i <n; i++) {
			h[i] = sc.nextInt();
		}
		for(int i = 0; i < n; i++) {
			double temp =Math.abs(a-(t-(h[i]*0.006)));
			if(temp < abs) {
				abs = temp;
				index = i+1;
			}
		}
		System.out.println(index);
	}
} 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];
		int index = 0;
		double abs = Double.MAX_VALUE;
		for(int i = 0; i <n; i++) {
			h[i] = sc.nextInt();
		}
		for(int i = 0; i < n; i++) {
			double temp =Math.abs(a-(t-(h[i]*0.006)));
			if(temp < abs) {
				abs = temp;
				index = i+1;
			}
		}
		System.out.println(index);
	}
} 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];
		int index = 0;
		double abs = Double.MAX_VALUE;
		for(int i = 0; i <n; i++) {
			h[i] = sc.nextInt();
		}
		for(int i = 0; i < n; i++) {
			double temp =Math.abs(a-(t-(h[i]*0.006)));
			if(temp < abs) {
				abs = temp;
				index = i+1;
			}
		}
		System.out.println(index);
	}
}
