include<iomanip>

include<iostream>

include<cmath>

using namespace std; int main() { long long n,m,f=0; cin>> n; long long a[n]; for(int i=0;i<n;i++){ cin>> m; a[i]=m; } for(int i=0;i<n;i++){ if(a[i]%2==0){ f=f+1;}} if(f==0){ cout << "NO";} else{ cout <<f<<endl; for(int i=n-1;i>=0;i--){ if (a[i]%2==0){ cout <<a[i]<<" ";}} }}