#include <stdio.h>
#include <iostream>
#include <algorithm>
#include <string.h>
#include <vector>
#define ll unsigned long long
using namespace std;
const int mod = 1e9 + 7;
__int128 read()
{
    __int128 x = 0, f = 1;
    char ch = getchar();
    while (!isdigit(ch) && ch != '-')
        ch = getchar();
    if (ch == '-')
        f = -1, ch = getchar();
    while (isdigit(ch))
        x = x * 10 + ch - '0', ch = getchar();
    return f * x;
}
void print(__int128 x)
{
    if (x < 0)
        putchar('-'), x = -x;
    if (x > 9)
        print(x / 10);
    putchar(x % 10 + '0');
}
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);
    string s1, s2;
    while (cin >> s1 >> s2)
    {
        if (s1 == "-9223372036854775808" || s2 == "-9223372036854775808")
        {
            ll a = 0, b = 0;
            if (s1 == "-9223372036854775808" && s2 == "-9223372036854775808")
            {
                cout << "1";
            }
            else if (s1 == "-9223372036854775808")
            {
                ll c = 9223372036854775807;
                c++;
                // cout << c << endl;
                if (s2[0] == '-')
                {
                    for (int i = 1; i < s2.size(); i++)
                    {
                        b *= 10;
                        b += s2[i] - '0';
                    }
                    cout << c / b;
                }
                else
                {
                    for (int i = 0; i < s2.size(); i++)
                    {
                        b *= 10;
                        b += s2[i] - '0';
                    }
                    cout << "-" << (c / b - (c % b != 0));
                }
            }
            else
            {
                if (s1[0] == '-' || s1[0] == '0')
                {
                    cout << "0";
                }
                else
                {
                    cout << "-1";
                }
            }
        }
        else
        {
            long long a = 0, b = 0;
            // a = read() ; b = read();
            if (s2[0] == '-')
            {
                for (int i = 1; i < s2.size(); i++)
                {
                    b *= 10;
                    b += s2[i] - '0';
                }
                b *= -1;
            }
            else
            {
                for (int i = 0; i < s2.size(); i++)
                {
                    b *= 10;
                    b += s2[i] - '0';
                }
            }
            if (s1[0] == '-')
            {
                for (int i = 1; i < s1.size(); i++)
                {
                    a *= 10;
                    a += s1[i] - '0';
                }
                a *= -1;
            }
            else
            {
                for (int i = 0; i < s1.size(); i++)
                {
                    a *= 10;
                    a += s1[i] - '0';
                }
            }
            if ((a < 0 && b < 0) || (a > 0 && b > 0))
            {
                ll c = a / b;
                cout << c;
            }
            else
            {
                cout << a / b - (a % b != 0);
            }
        }

        cout << endl;
    }
}