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Author	SHA1	Message	Date
Fisher Wang	589e79f78a	some refinement	2021-03-12 22:29:45 +08:00
Fisher Wang	8527c7c83c	replace the solution of problem 66 and set the difficulty	2021-03-11 17:10:53 +08:00
Fisher Wang	0d8a4a025b	test	2021-03-09 22:01:03 +08:00
Fisher Wang	d931b008a3	Give another solution of problem #66, and fix the old solution as #142 did	2021-03-09 21:42:18 +08:00