#include<iostream>
#include<cctype>
using namespace std;
int main(){
    int a,b;
    if(!(cin>>a>>b)){
        cout>>"Invalid input";
        return 0;
    }
    else if(b==0){
        cout<<"Division by zero is not allowed";
    }
    else{
        cout<<a/b;
    }
    return 0;
}