3 assert(collatz_max(10) == (19, 9))

     2 def urbanmain() = {

     4 assert(collatz_max(100) == (118, 97))

     3 

     5 assert(collatz_max(1000) == (178, 871))

     4   import C1._

     6 assert(collatz_max(10000) == (261, 6171))

     5 

     7 assert(collatz_max(100000) == (350, 77031))

     6   assert(collatz_max(10) == (19, 9))

     8 assert(collatz_max(1000000) == (524, 837799))

     7   assert(collatz_max(100) == (118, 97))

     8   assert(collatz_max(1000) == (178, 871))

     9   assert(collatz_max(10000) == (261, 6171))

    10   assert(collatz_max(100000) == (350, 77031))

    11   assert(collatz_max(1000000) == (524, 837799))

    12 }