#include <iostream>

using namespace std;

int calcul(int n)
{
 int i=0, p=0;
 while(n)
 {
     if(n%2==0)
        p++;
     else
        i++;
    n=n/10;
 }

 if(i>p)
    return i-p;
 else
    return p-i;
}

int main()
{
   cout<<calcul(92465);

}