#include<fstream.h>

ifstream f("date.in");
ofstream g("date.out");

int t[100],n;

void citire()
 {f>>n;
 for(int i=1;i<=n;i++)
   f>>t[i];
  }

 void main()
  {citire();
   int k=0;
   for(int i=1;i<=n;i++)
    if(t[i]==0) k++;
    g<<k<<" ";
  }