#include
using namespace std;
int main() {
int value;
size_t odd = 0;
while (true) {
cin >> value;
if (!value) break;
odd += value & 1;
}
cout << odd << '\n';
}
#include
using namespace std;
int main()
{
int answer = 0;
int temp;
cin>>temp;
while(temp != 0){
if (temp%2 == 1){
answer = answer + 1;
}
cin >> temp;
}
cout << answer;
return 0;
}