#include <bits/stdc++.h>
using namespace std;
#define LL long long
const int N = 1e5 + 10;
const int INF = 0x3f3f3f3f;
int x[N];
int c[N];
int main()
{
	string a;
	LL y;
	cin >> a >> y;
	int lena = a.size();
	for(int i = 0 ; i < lena ; i++)
		x[i] = a[i] - '0';
	LL len = 0;
	LL ans = 0;
	for(int i = 0 ; i< lena ; i++)
	{
		int f = 0;
		ans = ans * 10 + x[i];
		if(ans >= y)
		{
			f = ans/y;
			ans = ans % y;
		}
		c[len++] = f;
	}
	LL num = 0;
	while(c[num] == 0 && num < len)
		num++;
	if(num >= len)
	{
		cout << "0";
		return 0;
	}
	for(int i = num ; i < len ; i++)
		cout << c[i];
	return 0;
}