#include
using namespace std;
int main() {
int n;
cin>>n;
int cumulative sum=0;
int a[100];
for (int i=0;i<=n;i++){
cin>>a[i];
}
for (int i=0;i<=n;i++){
cumulative sum= cumulative sum+a[i];
if (a[i]<0){
break;
}
cout<<i<endl;
}
return 0;
}