#include <bits/stdc++.h>
#define int long long
#define ull unsigned long long 
#define lson k<<1
#define rson (k<<1)|1
#define debug cout<<666<<endl;
using namespace std;
const int N=1e6+5;
void vision()
{
    int a,b;
    while(cin>>a>>b)
    {
        // cout<<a;
        if(a==-9223372036854775808&&b==-1)
        {
            cout<<"9223372036854775808"<<'\n';
            continue;
        }
        if(a==0) cout<<0<<"\n";
        else if(a>0&&b>0)
        {
            int d=a/b;
            cout<<d<<"\n";
        }
        else if(a<0&&b<0)
        {
            ull d=a/b;
            cout<<d<<'\n';
        }
        else 
        {
            int d=a/b;
            if(a%b!=0)d--;
            cout<<d<<"\n";
        }
    }
    return ;
}
signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int t=1;
    // cin>>t;
    while(t--){
        vision();
    }
    return 0;
}