Collection of Postage Stamps

#include <iostream>
#include <bitset>
using namespace std;
bitset<1000001> b;
int main()
{ int i,k,v;
  cin>>k;
  b.reset();
  b.set(0);
  for(i=0;i<k;i++)
  { cin>>v;
    b|=b<<v;
  }
  cout<<b.count()<<endl;
  return 0;
}