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];
		double min = 10000000;
		int a = 0;
		for(int i=0; i<N; i++) {
			H[i] = sc.nextInt();
		}
		sc.close();
		for(int i=0; i<N; i++) {
			double d = Math.abs(A - (T - H[i] * 0.006));
		      if (min > d) {
		        min = d;
		        a = i+1;
		      }
		}
		System.out.println(a);
	}

} 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];
		double min = 10000000;
		int a = 0;
		for(int i=0; i<N; i++) {
			H[i] = sc.nextInt();
		}
		sc.close();
		for(int i=0; i<N; i++) {
			double d = Math.abs(A - (T - H[i] * 0.006));
		      if (min > d) {
		        min = d;
		        a = i+1;
		      }
		}
		System.out.println(a);
	}

} 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];
		double min = 10000000;
		int a = 0;
		for(int i=0; i<N; i++) {
			H[i] = sc.nextInt();
		}
		sc.close();
		for(int i=0; i<N; i++) {
			double d = Math.abs(A - (T - H[i] * 0.006));
		      if (min > d) {
		        min = d;
		        a = i+1;
		      }
		}
		System.out.println(a);
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int T = sc.nextInt();
		int A = sc.nextInt();
		int[] H = new int[N];
		double min = 10000000;
		int a = 0;
		for(int i=0; i<N; i++) {
			H[i] = sc.nextInt();
		}
		sc.close();
		for(int i=0; i<N; i++) {
			double d = Math.abs(A - (T - H[i] * 0.006));
		      if (min > d) {
		        min = d;
		        a = i+1;
		      }
		}
		System.out.println(a);
	} 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 double min = 10000000; min 10000000 int a = 0; a 0 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 sc.close() sc.close sc for(int i=0; i<N; i++) {
			double d = Math.abs(A - (T - H[i] * 0.006));
		      if (min > d) {
		        min = d;
		        a = i+1;
		      }
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			double d = Math.abs(A - (T - H[i] * 0.006));
		      if (min > d) {
		        min = d;
		        a = i+1;
		      }
		} {
			double d = Math.abs(A - (T - H[i] * 0.006));
		      if (min > d) {
		        min = d;
		        a = i+1;
		      }
		} double d = Math.abs(A - (T - H[i] * 0.006)); d 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 (min > d) {
		        min = d;
		        a = i+1;
		      } min > d min d {
		        min = d;
		        a = i+1;
		      } min = d min d a = i+1 a i+1 i 1 System.out.println(a) System.out.println System.out System System.out a 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];
		double min = 10000000;
		int a = 0;
		for(int i=0; i<N; i++) {
			H[i] = sc.nextInt();
		}
		sc.close();
		for(int i=0; i<N; i++) {
			double d = Math.abs(A - (T - H[i] * 0.006));
		      if (min > d) {
		        min = d;
		        a = i+1;
		      }
		}
		System.out.println(a);
	}

} 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];
		double min = 10000000;
		int a = 0;
		for(int i=0; i<N; i++) {
			H[i] = sc.nextInt();
		}
		sc.close();
		for(int i=0; i<N; i++) {
			double d = Math.abs(A - (T - H[i] * 0.006));
		      if (min > d) {
		        min = d;
		        a = i+1;
		      }
		}
		System.out.println(a);
	}

} 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];
		double min = 10000000;
		int a = 0;
		for(int i=0; i<N; i++) {
			H[i] = sc.nextInt();
		}
		sc.close();
		for(int i=0; i<N; i++) {
			double d = Math.abs(A - (T - H[i] * 0.006));
		      if (min > d) {
		        min = d;
		        a = i+1;
		      }
		}
		System.out.println(a);
	}

}