#include<bits/stdc++.h>
using namespace std;
int main()
{
	string a;
	int n;
	int x;
	cin>>n>>x;
	int s,y;
	char d;
	while(s!=0)
	{
		s=n/x;
		y=n%x;
		if(y>10) d=y+55;
		else d=y+48;
		a+=d;
		n=s;
	}
	for(int i=a.size()-1;i>=0;i--)
	{
		cout<<a[i];
	}
	cout<<endl;
	return 0;
}