Why this gives wrong output

Question

package array;
import java.util.Scanner;
public class Study {
public static void main(String[] args)
{
Scanner sc = new Scanner(System.in);
int size = sc.nextInt();
int arr[] = new int [size];
for(int i=0;i<size;i++)
{
arr[i] = sc.nextInt();
}
dis(arr,size);
}
public static void dis(int arr[],int size)
{
int c =0 ;
boolean val =true;
for(int i=0;i<size;i++)
{
for(int j=i-1; j>=0;j--)
{
if(arr[i]==arr[j])
{
val=false;
break;
}
}
if(val==true);
c++;
val=true;
}
System.out.println(c);
}
}

Answer 1

What output you want?

Answer 2

it counts unique numbers in array,
but there is wrong semicolon after if();
if (val==true) //;
c++;