#include<bits/stdc++.h>
using namespace std;
int a[100010];
int maxn=-1,minn=1e9+10,ans;
int read()
{
	int s=0,f=1;
	char ch=getchar();
	while(!isdigit(ch))
	{
		if(ch=='-')f=-1;
		ch=getchar();
	}
	while(isdigit(ch))
	{
		s=(s<<3)+(s<<1)+ch-'0';
		ch=getchar();
	}
	return s*f;
}
void write(int x)
{
	if(x<0)putchar('-'),x=-x;
	if(x>9)write(x/10);
	putchar(x%10+'0');
}
int main()
{
	int n=read();
	for(int i=1;i<=n;i++)
	{
		int x=read();
		
		if(x!=0)
		{
			a[x]++;
			maxn=max(maxn,x);
			minn=min(minn,x);
		}
		
	}
	if(maxn!=0||minn!=0)
	{
		for(int i=minn;i<=maxn;i++)
		{
			ans+=a[i]+1;
		}
		write(ans);
	}
	
	else 
	{
		write(0);
		return 0;
	}
	return 0;
}