#include <iostream>
using namespace std;

void duplicare(unsigned int &n){
    int c, d = 1;

    while(n/d > 0){
        c = n/d%10;
        if(c%2==0){
            n = ((n/d)*10 + c/2)*d + n%d;
            d = d * 10;
        }
        d = d * 10;
    }
}
int main(){
    unsigned int n = 3490;
    duplicare(n);
    cout<<n;
}