Submission #6356157

---

Source Code Expand

N,K=gets.split.map &:to_i
unless K<=(N-1)*(N-2)/2
  p -1
  exit
end
k=N*(N-1)/2
p k-K
1.upto(N) do |u|
  (u+1).upto(N) do |v|
    puts [u,v]*" "
    k-=1
    exit if k==K
  end
end

Submission Info

Compile Error

./Main.rb:1: warning: `&' interpreted as argument prefix
./Main.rb:3: warning: ambiguous first argument; put parentheses or a space even after `-' operator

Judge Result