import java.util.*;

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 = Math.abs(t - h[0]*0.006 - a);
	int id = 0;

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

	System.out.println(id+1);
    }
} import java.util.*; util.* java 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 = Math.abs(t - h[0]*0.006 - a);
	int id = 0;

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

	System.out.println(id+1);
    }
} 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 = Math.abs(t - h[0]*0.006 - a);
	int id = 0;

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

	System.out.println(id+1);
    } 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 = Math.abs(t - h[0]*0.006 - a);
	int id = 0;

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

	System.out.println(id+1);
    } 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 = Math.abs(t - h[0]*0.006 - a); min Math.abs(t - h[0]*0.006 - a) Math.abs Math t - h[0]*0.006 - a t - h[0]*0.006 - a t h[0]*0.006 h[0] h 0 0.006 a int id = 0; id 0 for(int i = 1;i < n;i++){
	    double dif = Math.abs(t - h[i]*0.006 - a);
	    if(min > dif){
		min = dif;
		id = i;
	    }
	} int i = 1; int i = 1; i 1 i < n i n i++ i++ i {
	    double dif = Math.abs(t - h[i]*0.006 - a);
	    if(min > dif){
		min = dif;
		id = i;
	    }
	} {
	    double dif = Math.abs(t - h[i]*0.006 - a);
	    if(min > dif){
		min = dif;
		id = i;
	    }
	} double dif = Math.abs(t - h[i]*0.006 - a); dif 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(min > dif){
		min = dif;
		id = i;
	    } min > dif min dif {
		min = dif;
		id = i;
	    } min = dif min dif id = i id i System.out.println(id+1) System.out.println System.out System System.out id+1 id 1 String[] args args
import java.util.*;

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 = Math.abs(t - h[0]*0.006 - a);
	int id = 0;

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

	System.out.println(id+1);
    }
}
