%problem from http://www.parade.com/askmarilyn/numbrix/archive/blueberry/Numbrix-20110626.html
#const n=9.
hint(1,1,81).
hint(1,3,79).
hint(1,5,75).
hint(1,7,63).
hint(1,9,61).
hint(3,1,39).
hint(3,9,57).
hint(5,1,35).
hint(5,9,53).
hint(7,1,31).
hint(7,9,15).
hint(9,1,29).
hint(9,3,27).
hint(9,5,9).
hint(9,7,11).
hint(9,9,13).
