MosCraciun3

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
    long long n,p,k;
    cin>>n>>p>>k;
    if(pow(10,p+k)/10>n)
        cout<<"imposibil";
    else
    {
        long long ogl=0,putere=1;
        while(k>0)
        {
            ogl=ogl*10+n%10;
            putere*=10;
            k--;
            n/=10;
        }
        while(n>pow(10,p))
        {
            ogl=putere*(n%10)+ogl;
            putere*=10;
            n/=10;
        }
        long long oglp=0;
        while(n>0)
        {
            oglp=oglp*10+n%10;
            n/=10;
        }
        oglp=oglp*putere+ogl;
        cout<<oglp;
    }
    return 0;
}