#include <iostream>

using namespace std;

int putere ( int a , int b)
{   if(b==0)
    return 1;
    if(b==1)
    return a ;
     if (b%2 ==0 )
     return putere(a , b/2)* putere(a,b/2);
     if(b%2 ==1)
     return putere(a,b/2)* putere(a,b/2) * putere(a,1);
}

int putere2 ( int a , int b)
{ int c = a ;
    for(int i =2; i<=b ;i++)
        c=c*a;
    return c ;
}

int main()
{
    int a =2 , b=4;
    cout<<putere(a,b);

    return 0;
}