gistfile1.rb

def paths(n, path=[], result=[])
  if n == 0
    result << path
  elsif n > 0
    [2, 3, 7].each {|score| paths(n - score, path + [score], result)}
  end
  result
end

puts paths(1).to_s
puts paths(14).to_s
puts paths(5).to_s