1.#include <iostream>
using namespace std;
int main(){
unsigned a,k=0;
cin>>a;
while(a){
if(a%2)
k++;
cin>>a;
}
cout<<k;
return 0;
}
2.#include <bits/stdc++.h>
using namespace std;
bool ePrim(int x){
if(x==1) return false;
if(x==2 || x==3) return true;
if(x%2==0 || x%3==0) return false;
int i=5;
while(i*i<=x){
if(x%i==0 || x%(i+2)==0)
return false;
i+=6;
}
return true;
}
int main(){
int n;
cin>>n;
while(n){
if(ePrim(n)==false)
cout<<n<<" ";
cin>>n;
}
return 0;
}
