%problem from http://www.parade.com/askmarilyn/numbrix/archive/blueberry/Numbrix-20110426.html
#const n=9.
hint(1,1,9).
hint(1,5,19).
hint(1,9,65).
hint(2,2,11).
hint(2,5,18).
hint(2,8,61).
hint(5,1,35).
hint(5,2,32).
hint(5,8,56).
hint(5,9,69).
hint(8,2,43).
hint(8,5,48).
hint(8,8,77).
hint(9,1,41).
hint(9,5,49).
hint(9,9,79).
