Random code challenge scripts and stuff like that

palindromic_primes.rb

# Enter your code here. Read input from STDIN. Print output to STDOUT

require 'prime'

def ppn(n)
    Prime.each(Float::INFINITY).lazy.select do |p|
        p if p.to_s == p.to_s.reverse
    end.first(n.to_i)
end

n = STDIN.read
STDOUT.write ppn(n)