bazab

#include <bits/stdc++.h>
#include <windows.h>
using namespace std;
unsigned long long n10,nb,b,rest,poz=1,v¹⁰⁰¹,maxi=0;
int main()
{ cin>>n10>>b; while(n10>0) { rest=n10%b; n10=n10/b; nb=nb+rest*poz; poz*=10; }int i=1; while(nb) {v[i]=nb%10; nb/=10;i++;} for(int x=1;x<=i;x++) if(v[x]>maxi) maxi=v[x]; cout<<maxi;

}