import java.util.*;
public class Main{
 public static void main(String[] args){
   Scanner sc = new Scanner(System.in);
   int N = sc.nextInt();

   int[] a = new int[N];
   for(int i=0;i<N;i++) a[i] =sc.nextInt();

   Arrays.sort(a);
   int count =1;
   int tmp =a[0];
   for(int i=1;i<N;i++)
   {
     if(tmp<a[i])
     {
       tmp = a[i];
       count++;
     }
   }
   System.out.println(count);
 }
} 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[] a = new int[N];
   for(int i=0;i<N;i++) a[i] =sc.nextInt();

   Arrays.sort(a);
   int count =1;
   int tmp =a[0];
   for(int i=1;i<N;i++)
   {
     if(tmp<a[i])
     {
       tmp = a[i];
       count++;
     }
   }
   System.out.println(count);
 }
} Main public static void main(String[] args){
   Scanner sc = new Scanner(System.in);
   int N = sc.nextInt();

   int[] a = new int[N];
   for(int i=0;i<N;i++) a[i] =sc.nextInt();

   Arrays.sort(a);
   int count =1;
   int tmp =a[0];
   for(int i=1;i<N;i++)
   {
     if(tmp<a[i])
     {
       tmp = a[i];
       count++;
     }
   }
   System.out.println(count);
 } main {
   Scanner sc = new Scanner(System.in);
   int N = sc.nextInt();

   int[] a = new int[N];
   for(int i=0;i<N;i++) a[i] =sc.nextInt();

   Arrays.sort(a);
   int count =1;
   int tmp =a[0];
   for(int i=1;i<N;i++)
   {
     if(tmp<a[i])
     {
       tmp = a[i];
       count++;
     }
   }
   System.out.println(count);
 } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc int[] a = new int[N]; a new int[N] N for(int i=0;i<N;i++) a[i] =sc.nextInt(); int i=0; int i=0; i 0 i<N i N i++ i++ i a[i] =sc.nextInt(); a[i] =sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc Arrays.sort(a) Arrays.sort Arrays a int count =1; count 1 int tmp =a[0]; tmp a[0] a 0 for(int i=1;i<N;i++)
   {
     if(tmp<a[i])
     {
       tmp = a[i];
       count++;
     }
   } int i=1; int i=1; i 1 i<N i N i++ i++ i {
     if(tmp<a[i])
     {
       tmp = a[i];
       count++;
     }
   } {
     if(tmp<a[i])
     {
       tmp = a[i];
       count++;
     }
   } if(tmp<a[i])
     {
       tmp = a[i];
       count++;
     } tmp<a[i] tmp a[i] a i {
       tmp = a[i];
       count++;
     } tmp = a[i] tmp a[i] a i count++ count System.out.println(count) System.out.println System.out System System.out count String[] args args public class Main{
 public static void main(String[] args){
   Scanner sc = new Scanner(System.in);
   int N = sc.nextInt();

   int[] a = new int[N];
   for(int i=0;i<N;i++) a[i] =sc.nextInt();

   Arrays.sort(a);
   int count =1;
   int tmp =a[0];
   for(int i=1;i<N;i++)
   {
     if(tmp<a[i])
     {
       tmp = a[i];
       count++;
     }
   }
   System.out.println(count);
 }
} public class Main{
 public static void main(String[] args){
   Scanner sc = new Scanner(System.in);
   int N = sc.nextInt();

   int[] a = new int[N];
   for(int i=0;i<N;i++) a[i] =sc.nextInt();

   Arrays.sort(a);
   int count =1;
   int tmp =a[0];
   for(int i=1;i<N;i++)
   {
     if(tmp<a[i])
     {
       tmp = a[i];
       count++;
     }
   }
   System.out.println(count);
 }
} Main
import java.util.*;
public class Main{
 public static void main(String[] args){
   Scanner sc = new Scanner(System.in);
   int N = sc.nextInt();

   int[] a = new int[N];
   for(int i=0;i<N;i++) a[i] =sc.nextInt();

   Arrays.sort(a);
   int count =1;
   int tmp =a[0];
   for(int i=1;i<N;i++)
   {
     if(tmp<a[i])
     {
       tmp = a[i];
       count++;
     }
   }
   System.out.println(count);
 }
}