2015 年 3月 18 日随笔档案 - neverlandly

2015年3月18日

摘要： There are a row of houses, each house can be painted with three colors red, blue and green. The cost of painting each house with a certain color is di... 阅读全文

posted @ 2015-03-18 04:49 neverlandly 阅读(1615) 评论(0) 推荐(0)