%problem from http://www.parade.com/askmarilyn/numbrix/archive/blueberry/Numbrix-20110220.html
#const n=9.
hint(1,1,43).
hint(1,3,31).
hint(1,5,27).
hint(1,7,25).
hint(1,9,23).
hint(3,1,45).
hint(3,9,11).
hint(5,1,47).
hint(5,9,7).
hint(7,1,51).
hint(7,9,81).
hint(9,1,61).
hint(9,3,63).
hint(9,5,65).
hint(9,7,73).
hint(9,9,75).
