package yukicoder182;
import java.util.PriorityQueue;
import java.util.Scanner;
public class Main {
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		PriorityQueue<Integer> pq=new PriorityQueue<>(n);
		for(int i=0;i<n;i++){
			pq.add(sc.nextInt());
		}
		int count=1;
		int memo=pq.poll();
		while(!pq.isEmpty()){
			int t=pq.poll();
			if(t!=memo){
				count++;
				memo=t;
			}else{
				count--;
				while(t==memo&&!pq.isEmpty()){
					t=pq.poll();
					if(t!=memo)pq.add(t);
				}
				
			}
		}
		System.out.println(count);
	}
}