Subiect 2019, s III,1

#include <iostream>
using namespace std;
int main ()
{
    int rez=0,n,aux,ogl=t;
    cin>>n;
    aux=n;
    while (aux>0)
    {
        t=aux%10;
        if (t%2==0)
        {
            rez=rez*10+(t-1);
        }
        else
        {
            rez=rez*10+t;
        }
        aux=aux/10;
    }
    while (rez>0)
    {
        ogl=ogl*10+rez%10;
        rez=rez/10;
    }
    cou<<ogl;
    return 0;
}