#include <bits/stdc++.h>
using namespace std;
void inttos(int n,int s)
{
	string sn="";
	while (n>s)
	{
		if (n%s>=10) sn+=n%s+'A';
		else sn+=n%s;
		n/=s;
	}
	if (n>=10) sn+=n+'A';
	else sn+=n+'0';
	for (int i=sn.size()-1;i>=0;i--) cout<<sn[i];
}
int main()
{
	int n,s;
	cin>>n>>s;
	inttos(n,s);
	return 0;
}