eliminarecifremaimarica5

#include<iostream>
using namespace std;
int main()
{
    int x, nrnou=0, d=1;
    cin>>x;
    while(x)
    {
        if(x%10<=5)
        {
            nrnou=(x%10)*d+nrnou;
            d=d*10;
        }
        x=x/10;
    }
    cout<<nrnou;
    return 0;
}