剑锋OI SharpSwordOI

时间限制：1S / 空间限制：256MB 【在线测试提交传送门】【问题描述】 There is a directed acyclic graph with n vertices and m edges. You are allowed to delete exact k edges in such way that the lexicographically minimal topolog

本文系转载，原创请访问：http://www.cnblogs.com/qscqesze/p/4381727.html1029: [JSOI2007]建筑抢修Time Limit: 4 Sec  Memory Limit: 162 MB题目连接http://www.lydsy.com/JudgeOnline/problem.php?id=1029Descripti

优先队列priority_queue详解本文非原创，原创地址：https://blog.youkuaiyun.com/c20182030/article/details/70757660优先队列是一种特殊的队列，说白了，就是一种功能强大的队列。它的功能强大在哪里呢？ 四个字：自动排序。优先队列的头文件&&声明#include<que