#include<iostream>
#include<bits/stdc++.h>
using namespace std;
int main()
{
double a,b,x,y;
cin>>a>>b;
y=a*x+b;
//x=(y-b)/a;
if((y==0)&&(a==0)&&(b==0))
cout<<"nieskonczenie wiele"<<endl;
if((y==0)&&(x!=0)&&(a!=0))
cout<<(y-b)/a<<endl;
if(y!=0)
cout<<"brak"<<endl;
return 0;
}
I2luY2x1ZGU8aW9zdHJlYW0+CiNpbmNsdWRlPGJpdHMvc3RkYysrLmg+CgogICAgdXNpbmcgbmFtZXNwYWNlIHN0ZDsKICAgIGludCBtYWluKCkKewogICAgZG91YmxlIGEsYix4LHk7CiAgICBjaW4+PmE+PmI7CiB5PWEqeCtiOwogLy94PSh5LWIpL2E7CgppZigoeT09MCkmJihhPT0wKSYmKGI9PTApKQpjb3V0PDwibmllc2tvbmN6ZW5pZSB3aWVsZSI8PGVuZGw7CiAgICBpZigoeT09MCkmJih4IT0wKSYmKGEhPTApKQogICAgY291dDw8KHktYikvYTw8ZW5kbDsKICAgIGlmKHkhPTApCiAgICAgICAgY291dDw8ImJyYWsiPDxlbmRsOwoKICAgIHJldHVybiAwOwp9Cg==