%problem from http://www.parade.com/askmarilyn/numbrix/archive/blueberry/Numbrix-20120115.html
#const n=9.
hint(1,1,31).
hint(1,3,29).
hint(1,5,23).
hint(1,7,5).
hint(1,9,7).
hint(3,1,35).
hint(3,9,9).
hint(5,1,69).
hint(5,9,15).
hint(7,1,71).
hint(7,9,47).
hint(9,1,79).
hint(9,3,77).
hint(9,5,61).
hint(9,7,55).
hint(9,9,49).
