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];

        for (int i = 0; i < N; i++) {
            H[i] = sc.nextInt();
        }

        int ans = 0;
        int tmp = 10000000;
        for (int i = 0; i < N; i++) {
            int d = Math.abs(A * 1000 - (T * 1000 - H[i] * 6));
            if (d < tmp) {
                tmp = d;
                ans = i + 1;
            }
        }

        System.out.println(ans);
    }
} 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];

        for (int i = 0; i < N; i++) {
            H[i] = sc.nextInt();
        }

        int ans = 0;
        int tmp = 10000000;
        for (int i = 0; i < N; i++) {
            int d = Math.abs(A * 1000 - (T * 1000 - H[i] * 6));
            if (d < tmp) {
                tmp = 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;
        int tmp = 10000000;
        for (int i = 0; i < N; i++) {
            int d = Math.abs(A * 1000 - (T * 1000 - H[i] * 6));
            if (d < tmp) {
                tmp = 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;
        int tmp = 10000000;
        for (int i = 0; i < N; i++) {
            int d = Math.abs(A * 1000 - (T * 1000 - H[i] * 6));
            if (d < tmp) {
                tmp = 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 int tmp = 10000000; tmp 10000000 for (int i = 0; i < N; i++) {
            int d = Math.abs(A * 1000 - (T * 1000 - H[i] * 6));
            if (d < tmp) {
                tmp = d;
                ans = i + 1;
            }
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            int d = Math.abs(A * 1000 - (T * 1000 - H[i] * 6));
            if (d < tmp) {
                tmp = d;
                ans = i + 1;
            }
        } {
            int d = Math.abs(A * 1000 - (T * 1000 - H[i] * 6));
            if (d < tmp) {
                tmp = d;
                ans = i + 1;
            }
        } int d = Math.abs(A * 1000 - (T * 1000 - H[i] * 6)); d Math.abs(A * 1000 - (T * 1000 - H[i] * 6)) Math.abs Math A * 1000 - (T * 1000 - H[i] * 6) A * 1000 A 1000 (T * 1000 - H[i] * 6) T * 1000 T 1000 H[i] * 6 H[i] H i 6 if (d < tmp) {
                tmp = d;
                ans = i + 1;
            } d < tmp d tmp {
                tmp = d;
                ans = i + 1;
            } tmp = d tmp 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;
        int tmp = 10000000;
        for (int i = 0; i < N; i++) {
            int d = Math.abs(A * 1000 - (T * 1000 - H[i] * 6));
            if (d < tmp) {
                tmp = 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;
        int tmp = 10000000;
        for (int i = 0; i < N; i++) {
            int d = Math.abs(A * 1000 - (T * 1000 - H[i] * 6));
            if (d < tmp) {
                tmp = d;
                ans = i + 1;
            }
        }

        System.out.println(ans);
    }
} 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];

        for (int i = 0; i < N; i++) {
            H[i] = sc.nextInt();
        }

        int ans = 0;
        int tmp = 10000000;
        for (int i = 0; i < N; i++) {
            int d = Math.abs(A * 1000 - (T * 1000 - H[i] * 6));
            if (d < tmp) {
                tmp = d;
                ans = i + 1;
            }
        }

        System.out.println(ans);
    }
}
