2015年6月10日
左偏树(DP)问题
摘要： 问题：A straight dirt road connects two fields on FJ's farm, but it changes elevation more than FJ would like. His cows do not mind climbing up or down a... 阅读全文
posted @ 2015-06-10 10:25 chaoer 阅读(169) 评论(0) 推荐(0)