#include<bits/stdc++.h>
#define lowbit(x) (x&(-x))
#define rep(x,a,b) for(int x=a;x<=b;x++)
#define pre(x,a,b) for(int x=a;x>=b;x--)
#define ac puts("Yes")
#define wa puts("No")
#define endl "\n"
#define pb push_back
#define ll long long
#define pii pair<ll,ll>
#define psi pair<string, ll>
#define de cout<<1;
#define mem(a,x) memset(a,x,sizeof a)
#define IOS ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
using namespace std;
// static char buf[100000],*pa=buf,*pd=buf;
// #define gc pa==pd&&(pd=(pa=buf)+fread(buf,1,100000,stdin),pa==pd)?EOF:*pa++
// inline int read()
// {
//     register int x(0);register char c(gc);
//     while(c<'0'||c>'9')c=gc;
//     while(c>='0'&&c<='9')x=(x<<1)+(x<<3)+(c^48),c=gc;
//     return x;
// }
const int mod1=998244353;
const int mod2=1e9+7;
const int N = 1e6 + 60;
int number;
void read(__int128 &x)
{
	x = 0;int f = 1;char ch = getchar();
	while(!isdigit(ch)) {if(ch == '-') f = -1;ch = getchar();}
	while(isdigit(ch)){x = x * 10 + ch - 48;ch = getchar();}
	x *= f;
}
inline void print(__int128 x)
{
	if(x < 0)
	{
		putchar('-');
		x = -x;
	}
	if(x > 9)print(x/10);
	putchar(x%10+'0');
}
void solve()
{
	string n, m;
	__int128 x = 0, y = 0;
	while(cin >> n)
	{
		cin >> m;
		x = 0, y = 0;
		int f = 0;
		f %= 2;
		rep(i, 0, n.size()-1)
		{
			if(n[i] == '-') continue;
			x *= 10;//print(x);
			x += (n[i] - '0');
		}
		rep(i, 0, m.size()-1)
		{
			if(m[i] == '-') continue;
			y *= 10;
			y += (m[i] - '0');
		}
		if(n[0] == '-') x = -x;
		if(m[0] == '-') y = -y;
		// print(x);
		// cout << endl;print(y);cout<<endl;
		if(x % y == 0)print(x/y);
		else if(x == 0) cout << 0;
		else if(x > 0 && y > 0) print(x/y);
		else if(x < 0 && y < 0) print(x/y);
		else print((x / y) - 1);
		cout << endl;
	}

}
int main()
{
	//IOS;
	int _;
	//cin >> _;
	_ = 1;
	while(_ -- )
	{
		number++;
		solve();;
	}
	return 0;
}