Right now I'm settings up APIO 2011 contest for training purposes. It seems to me like test data (answers, to be precise) in problems 'Guess My Word' and 'Table Coloring' are broken. I have three solutions from three different people for the latter problem and they produce the same answers for tests 10, 12, 14, 16 and 18 — zero, while the reference answer is non-zero. For the 'Guess my Word' problem I have two solutions: one fast and one brute-force with memoization which I wrote by myself several minutes ago. These two solutions produce same output on tests 1-16, but they both produce 'No' on some test cases where official test data says 'Yes'.
Does anyone have information about validity of this test data or some solutions which I can test with too?