bac 2017 sub 3 ex 3

#include <iostream>

using namespace std;

int v[100];

int duplicare(int n) {
    int c = 0, i = 0;
    while (n != 0) {
        c++; i++;
        v[i] = n % 10;
        n /= 10;
    }
    for (i = c; i >= 1; i--) {
        n = n * 10 + v[i];
        if(v[i] % 2 == 0)
            n = n * 10 + v[i] / 2;
    }
    return n;
}

int main () {
    int n;
    cin >> n;
    cout << duplicare(n);
}