import java.util.Arrays;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();

        int[] d = new int[N];
        for (int i = 0; i < N; i++) {
            d[i] = sc.nextInt();
        }
        Arrays.sort(d);

        int sheets = 0;
        for (int i = 0; i < N; i++) {
            if (i==0 || d[N-1-i]<d[N-i]) {
                sheets++;
            }
        }

        System.out.printf("%d\n", sheets);
        sc.close();
    }
} import java.util.Arrays; Arrays java.util 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[] d = new int[N];
        for (int i = 0; i < N; i++) {
            d[i] = sc.nextInt();
        }
        Arrays.sort(d);

        int sheets = 0;
        for (int i = 0; i < N; i++) {
            if (i==0 || d[N-1-i]<d[N-i]) {
                sheets++;
            }
        }

        System.out.printf("%d\n", sheets);
        sc.close();
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();

        int[] d = new int[N];
        for (int i = 0; i < N; i++) {
            d[i] = sc.nextInt();
        }
        Arrays.sort(d);

        int sheets = 0;
        for (int i = 0; i < N; i++) {
            if (i==0 || d[N-1-i]<d[N-i]) {
                sheets++;
            }
        }

        System.out.printf("%d\n", sheets);
        sc.close();
    } main {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();

        int[] d = new int[N];
        for (int i = 0; i < N; i++) {
            d[i] = sc.nextInt();
        }
        Arrays.sort(d);

        int sheets = 0;
        for (int i = 0; i < N; i++) {
            if (i==0 || d[N-1-i]<d[N-i]) {
                sheets++;
            }
        }

        System.out.printf("%d\n", sheets);
        sc.close();
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc int[] d = new int[N]; d new int[N] N for (int i = 0; i < N; i++) {
            d[i] = sc.nextInt();
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            d[i] = sc.nextInt();
        } {
            d[i] = sc.nextInt();
        } d[i] = sc.nextInt() d[i] d i sc.nextInt() sc.nextInt sc Arrays.sort(d) Arrays.sort Arrays d int sheets = 0; sheets 0 for (int i = 0; i < N; i++) {
            if (i==0 || d[N-1-i]<d[N-i]) {
                sheets++;
            }
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            if (i==0 || d[N-1-i]<d[N-i]) {
                sheets++;
            }
        } {
            if (i==0 || d[N-1-i]<d[N-i]) {
                sheets++;
            }
        } if (i==0 || d[N-1-i]<d[N-i]) {
                sheets++;
            } i==0 || d[N-1-i]<d[N-i] i==0 i 0 d[N-1-i]<d[N-i] d[N-1-i] d N-1-i N-1-i N 1 i d[N-i] d N-i N i {
                sheets++;
            } sheets++ sheets System.out.printf("%d\n", sheets) System.out.printf System.out System System.out "%d\n" sheets sc.close() sc.close sc String[] args args public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();

        int[] d = new int[N];
        for (int i = 0; i < N; i++) {
            d[i] = sc.nextInt();
        }
        Arrays.sort(d);

        int sheets = 0;
        for (int i = 0; i < N; i++) {
            if (i==0 || d[N-1-i]<d[N-i]) {
                sheets++;
            }
        }

        System.out.printf("%d\n", sheets);
        sc.close();
    }
} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();

        int[] d = new int[N];
        for (int i = 0; i < N; i++) {
            d[i] = sc.nextInt();
        }
        Arrays.sort(d);

        int sheets = 0;
        for (int i = 0; i < N; i++) {
            if (i==0 || d[N-1-i]<d[N-i]) {
                sheets++;
            }
        }

        System.out.printf("%d\n", sheets);
        sc.close();
    }
} Main
import java.util.Arrays;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();

        int[] d = new int[N];
        for (int i = 0; i < N; i++) {
            d[i] = sc.nextInt();
        }
        Arrays.sort(d);

        int sheets = 0;
        for (int i = 0; i < N; i++) {
            if (i==0 || d[N-1-i]<d[N-i]) {
                sheets++;
            }
        }

        System.out.printf("%d\n", sheets);
        sc.close();
    }
}