#include <bits/stdc++.h>
using namespace std;
#define REP(i,N) for(int i=0;i<N;i++)
int main(){
	int N;
	int count=0;
	cin>>N;
	int A[N];
	int flag[N];
	REP(i,N){
		flag[i]=0;
	}
	REP(i,N){
		cin>>A[i];
		if(flag[A[i]-1]==0){
			count++;
		}else if(flag[A[i]-1]==1){
			count--;
		}
		flag[A[i]-1]++;
	}
	cout<<count<<endl;
	return 0;
}