def my_collect
  t = (286..100000).collect{|i| i*(i+1)/2   }
  p = (166..100000).collect{|i| i*(3*i-1)/2 }
  h = (144..100000).collect{|i| i*(2*i-1)   }
  res=(t&p&h).first
  puts res
end

def my_each
  p=h=t=[]
  (144..100000).each{|i|
    t.push( i*(i+1)/2   ) if i>285
    p.push( i*(3*i-1)/2 ) if i>165
    h.push( i*(2*i-1)   ) if i>144
  }
  res=(t&p&h).first
  puts res
end