dsc-february-rompecabeza.rb

gistfile1.txt

# Sum of it's parts
#
# Find a SIX digit number in which the
# FIRST digit is ONE more than the THIRD,
# the SCOND digit is ONE less than the
# FOURTH, the FIFTH digit is ONE less than
# the THIRD, and the SIXTH digit is ONE
# more than the FOURTH. The sum of the
# SECOND and the THIRD digits equal the
# FIRST. The sum of all digits is 30.
#
# http://blog.dollarshaveclub.com/february-rompecabeza/

number = {first:0,second:0,third:0,fourth:0,fifth:0,sixth:0}


# Solve for the number not mentioned in the test
number[:fourth] = 2
number[:third] = 8

number[:first ] = number[:second] + number[:third]
number[:sixth] = number[:fourth] + 1
number[:fifth] = number[:third] - 1
number[:second] = number[:fourth] - 1
number[:first] = number[:third] + 1

puts number[:first] == number[:third] + 1
puts number[:second] == number[:fourth] - 1
puts number[:fifth] == number[:third] - 1
puts number[:sixth] == number[:fourth] + 1
puts number[:first ] == number[:second] + number[:third]

sum = number.values.inject(:+)
puts number.values.join(', ')

puts sum
puts sum == 30

answer = number.values.join
puts "Answer: #{answer}"