davecom/ClassicComputerScienceProblemsInSwift

Missing same column check

faif opened this issue 5 years ago · 0 comments

faif commented 5 years ago

ClassicComputerScienceProblemsInSwift/Classic Computer Science Problems in Swift.playground/Pages/Chapter 3.xcplaygroundpage/Contents.swift

Line 169 in 3773196

if q1r == q2r { return false } // rows same?

Two queens in the same column is also a constraint, so the following line needs to be added to generate a correct result:

if q1c == q2c { return false } // columns same?