#include <iostream>
#include <cmath>
using namespace std;
float a,b,c ;
int main()
{
cin >> a >>b >> c ;
if (a == 0 && (c-b)==0)
{
cout <<"NWR" ;
}
else if (a == 0 && (c-b)!=0)
{
cout <<"BR" ;
}
else
{
cout <<(round(100*(c-b)/a))/100 << endl;
}
return 0;
}
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