%problem from http://www.parade.com/askmarilyn/numbrix/archive/blueberry/Numbrix-20110403.html
#const n=9.
hint(1,1,81).
hint(1,3,79).
hint(1,5,69).
hint(1,7,51).
hint(1,9,47).
hint(3,1,75).
hint(3,9,45).
hint(5,1,61).
hint(5,9,11).
hint(7,1,33).
hint(7,9,13).
hint(9,1,29).
hint(9,3,27).
hint(9,5,23).
hint(9,7,19).
hint(9,9,15).
