pb30

#include <iostream>

using namespace std;// ||sau

int main() {

unsigned n,k,p=1,inv=0,inv2=0,nrcif=0;
cout<<"n=";cin>>n;
cout<<"k=";cin>>k;
int cn=n;
while (n!=0)
{
    nrcif++;
    n/=10;}
    if (nrcif<k)
    {
        cout<<"imposibil";
        return 0;
    }
    while (cn!=0)
    {
        inv=inv*10+cn%10;
        cn/=10;
    }
    while (k!=0)
    {
        p*=10;
        k--;
    }
    inv/=p;
    while (inv!=0)
    {
        inv2=inv2*10+inv%10;
        inv/=10;
        }
        cout<<"acu nr e: "<<inv2;

return 0;
}