import 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 min=10000;
		int ans=0;

		for(int i=0;i<n;i++){
			if(min>=Math.abs(a-t+h[i]*0.006)){
				min=Math.abs(a-t+h[i]*0.006);
				ans=i+1;
			}
		}

		System.out.println(ans);


	}
} import java.util.*; util.* java 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 min=10000;
		int ans=0;

		for(int i=0;i<n;i++){
			if(min>=Math.abs(a-t+h[i]*0.006)){
				min=Math.abs(a-t+h[i]*0.006);
				ans=i+1;
			}
		}

		System.out.println(ans);


	}
} 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 min=10000;
		int ans=0;

		for(int i=0;i<n;i++){
			if(min>=Math.abs(a-t+h[i]*0.006)){
				min=Math.abs(a-t+h[i]*0.006);
				ans=i+1;
			}
		}

		System.out.println(ans);


	} 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 min=10000;
		int ans=0;

		for(int i=0;i<n;i++){
			if(min>=Math.abs(a-t+h[i]*0.006)){
				min=Math.abs(a-t+h[i]*0.006);
				ans=i+1;
			}
		}

		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 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 min=10000; min 10000 int ans=0; ans 0 for(int i=0;i<n;i++){
			if(min>=Math.abs(a-t+h[i]*0.006)){
				min=Math.abs(a-t+h[i]*0.006);
				ans=i+1;
			}
		} int i=0; int i=0; i 0 i<n i n i++ i++ i {
			if(min>=Math.abs(a-t+h[i]*0.006)){
				min=Math.abs(a-t+h[i]*0.006);
				ans=i+1;
			}
		} {
			if(min>=Math.abs(a-t+h[i]*0.006)){
				min=Math.abs(a-t+h[i]*0.006);
				ans=i+1;
			}
		} if(min>=Math.abs(a-t+h[i]*0.006)){
				min=Math.abs(a-t+h[i]*0.006);
				ans=i+1;
			} min>=Math.abs(a-t+h[i]*0.006) min Math.abs(a-t+h[i]*0.006) Math.abs Math a-t+h[i]*0.006 a-t a t h[i]*0.006 h[i] h i 0.006 {
				min=Math.abs(a-t+h[i]*0.006);
				ans=i+1;
			} min=Math.abs(a-t+h[i]*0.006) min Math.abs(a-t+h[i]*0.006) Math.abs Math a-t+h[i]*0.006 a-t a t h[i]*0.006 h[i] h i 0.006 ans=i+1 ans i+1 i 1 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 t=sc.nextInt();
		int a=sc.nextInt();
		int h[]=new int[n];
		for(int i=0;i<n;i++){
			h[i]=sc.nextInt();
		}
		double min=10000;
		int ans=0;

		for(int i=0;i<n;i++){
			if(min>=Math.abs(a-t+h[i]*0.006)){
				min=Math.abs(a-t+h[i]*0.006);
				ans=i+1;
			}
		}

		System.out.println(ans);


	}
} 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 min=10000;
		int ans=0;

		for(int i=0;i<n;i++){
			if(min>=Math.abs(a-t+h[i]*0.006)){
				min=Math.abs(a-t+h[i]*0.006);
				ans=i+1;
			}
		}

		System.out.println(ans);


	}
} Main
import 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 min=10000;
		int ans=0;

		for(int i=0;i<n;i++){
			if(min>=Math.abs(a-t+h[i]*0.006)){
				min=Math.abs(a-t+h[i]*0.006);
				ans=i+1;
			}
		}

		System.out.println(ans);


	}
}
