#include <iostream>
using namespace std;
int main() {
int d=0,n;
while (true) {
cin>>n;
if (n==0) 
break;
if (n%2!=0) 
d++;
}
cout<<d<<endl;
return 0;
}

Test (vd):
nhập:
1
2
3
4
5
6
7
8
9
0
in ra 1 3 5 7 9

/**
 *    author:  tđq
**/
#include <bits/stdc++.h>
#define task ""

using namespace std;

typedef long long ll;

const ll nmax = 1e7 + 5;

ll n, d = 0;
int main()
{

 //freopen(task".inp" , "r" , stdin);
 //freopen(task".out" , "w" , stdout);

 ios::sync_with_stdio(false);
 cin.tie(0);

 while (cin >> n)
 {
    if (n == 0) break;
    if (n % 2 != 0) d++;
 }
 cout << d;
 return 0; 
}