new file:   prob_39.rb
problem: integer rigvht triangles, http://projecteuler.net/problem=39
new file:   prob_26.rb
problem: reciprocal cycles, http://projecteuler.net/problem=26
new file:   prob_29.rb
problem: distinct powers, http://projecteuler.net/problem=29
new file:   prob_32.rb
new file:   prob_32_2.rb
Fix me