Archive 2016 06/24 批改娘 10038. Fast Covering Problem DLXbranch-and-reduce algorithm批改娘最少重複覆蓋最少點集覆蓋 2015 03/08 UVa 11214 - Guarding the Chessboard DLX最少重複覆蓋 2014 11/11 UVa 12058 - Highway Monitor DLX啟發式最少重複覆蓋舞鏈