Saujan

# Curious Number
# n-digit number is said to be curious if the last n digits of 
# its square are the same as the original number.
# For example, 25^2 = 625 and 76^2 = 5776.
# (Curious numbers are also known as automorphic numbers.)

# An example of 9 digit number:
# 212890625^2 = 45322418212890625

#Q. Complete the code to return all the curious numbers for n digit

Saujan

# Curious Number
# n-digit number is said to be curious if the last n digits of 
# its square are the same as the original number.
# For example, 25^2 = 625 and 76^2 = 5776.
# (Curious numbers are also known as automorphic numbers.)

# An example of 9 digit number:
# 212890625^2 = 45322418212890625

#Q. Complete the code to return all the curious numbers for n digit

Saujan

# Curious Number
# n-digit number is said to be curious if the last n digits of 
# its square are the same as the original number.
# For example, 25^2 = 625 and 76^2 = 5776.
# (Curious numbers are also known as automorphic numbers.)

# An example of 9 digit number:
# 212890625^2 = 45322418212890625

#Q. Complete the code to return all the curious numbers for n digit

Saujan

# Curious Number
# n-digit number is said to be curious if the last n digits of 
# its square are the same as the original number.
# For example, 25^2 = 625 and 76^2 = 5776.
# (Curious numbers are also known as automorphic numbers.)

# An example of 9 digit number:
# 212890625^2 = 45322418212890625

#Q. Complete the code to return all the curious numbers for n digit

Saujan

#require 'byebug'
class HappyNumberEngine
	attr_accessor :visited_numbers
	
	def initialize
		@visited_numbers = [] # the container that collects the visited number.
	end

	def happy_number_minner(num)
		if need_squared?(num) # checking if squaring needed . Allow squaring except for 1.