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