Most years have 52 weeks, some have 53, according to ISO8601.



Task

Write a function which determines if a given year is long (53 weeks) or not, and demonstrate it.




   p   =:  1 4 _100 400&(7 | [: <. +/ @: %~)"1 0 
   ily =:  (4=p) +. 3=p@:<:
   ply =:  (#~ ily)@:([ + 1+i.@:-~)