#include <fstream>
using namespace std;
ifstream in("gfact.in");
ofstream out("gfact.out");
long long p,q;
long long nr(long long n)
{
    long long nrz=0,i=p;
    while(i<=n)
    {
        nrz=nrz+n/i;
        i=i*p;
    }
    return nrz;
}
int main()
{
    long long a,mij,i,st=1,dr=9223372036854775800,ok=0;
    in>>p>>q;
    while(st<=dr)
    {
        mij=(long long)((st+dr)/2);
        if(nr(mij)>=q)
            dr=mij-1;
        else
            st=mij+1;
    }
    out<<st;
    return 0;
}