poj 3687 Labeling Balls（拓补排序）
摘要：
DescriptionWindy hasNballs of distinct weights from 1 unit toNunits. Now he tries to label them with 1 toNin such a way that:No two balls share the sa... 阅读全文
posted @ 2015-10-28 20:49 无谓的味道 阅读(308) 评论(0) 推荐(0) 编辑