题目 At the beginning of every day, the first person who signs in the computer room will unlock the door, and the last one who signs out will lock the door. Given the records of signing in's and out's, you are supposed to find the ones who have unlocke…

题目地址 https://pta.patest.cn/pta/test/15/exam/4/question/713 5-5 堆中的路径   (25分) 将一系列给定数字插入一个初始为空的小顶堆H[].随后对任意给定的下标i,打印从H[i]到根结点的路径. 输入格式: 每组测试第1行包含2个正整数NN和MM(\le 1000≤1000),分别是插入元素的个数.以及需要打印的路径条数.下一行给出区间[-10000, 10000]内的NN个要被插入一个初始为空的小顶堆的整数.最后一行给出MM个下标.…

L2-032 彩虹瓶 (25 分)   彩虹瓶的制作过程(并不)是这样的:先把一大批空瓶铺放在装填场地上,然后按照一定的顺序将每种颜色的小球均匀撒到这批瓶子里. 假设彩虹瓶里要按顺序装 N 种颜色的小球(不妨将顺序就编号为 1 到 N).现在工厂里有每种颜色的小球各一箱,工人需要一箱一箱地将小球从工厂里搬到装填场地.如果搬来的这箱小球正好是可以装填的颜色,就直接拆箱装填:如果不是,就把箱子先码放在一个临时货架上,码放的方法就是一箱一箱堆上去.当一种颜色装填完以后,先看看货架顶端的一箱是不是下一个…

1060 Are They Equal (25 分)   If a machine can save only 3 significant digits, the float numbers 12300 and 12358.9 are considered equal since they are both saved as 0 with simple chopping. Now given the number of significant digits on a machine and tw…

7-17 字符串关键字的散列映射(25 分) 给定一系列由大写英文字母组成的字符串关键字和素数P,用移位法定义的散列函数H(Key)将关键字Key中的最后3个字符映射为整数,每个字符占5位:再用除留余数法将整数映射到长度为P的散列表中.例如将字符串AZDEG插入长度为1009的散列表中,我们首先将26个大写英文字母顺序映射到整数0~25:再通过移位将其映射为3×32​2​​+4×32+6=3206:然后根据表长得到,即是该字符串的散列映射位置. 发生冲突时请用平方探测法解决. 输入格式: 输入第…

题目链接:https://pintia.cn/problem-sets/994805046380707840/problems/994805069361299456 L2-006 树的遍历 (25 分)   给定一棵二叉树的后序遍历和中序遍历,请你输出其层序遍历的序列.这里假设键值都是互不相等的正整数. 输入格式: 输入第一行给出一个正整数N(≤30),是二叉树中结点的个数.第二行给出其后序遍历序列.第三行给出其中序遍历序列.数字间以空格分隔. 输出格式: 在一行中输出该树的层序遍历的序列.数字…

L2-013 红色警报 (25 分)   战争中保持各个城市间的连通性非常重要.本题要求你编写一个报警程序,当失去一个城市导致国家被分裂为多个无法连通的区域时,就发出红色警报.注意:若该国本来就不完全连通,是分裂的k个区域,而失去一个城市并不改变其他城市之间的连通性,则不要发出警报. 输入格式: 输入在第一行给出两个整数N(0 < N ≤ 500)和M(≤ 5000),分别为城市个数(于是默认城市从0到N-1编号)和连接两城市的通路条数.随后M行,每行给出一条通路所连接的两个城市的编号,其间以1…

The "Hamilton cycle problem" is to find a simple cycle that contains every vertex in a graph. Such a cycle is called a "Hamiltonian cycle". In this problem, you are supposed to tell if a given cycle is a Hamiltonian cycle. Input Specif…

A clique is a subset of vertices of an undirected graph such that every two distinct vertices in the clique are adjacent. A maximal clique is a clique that cannot be extended by including one more adjacent vertex. (Quoted from https://en.wikipedia.or…

1122 Hamiltonian Cycle (25 分) The "Hamilton cycle problem" is to find a simple cycle that contains every vertex in a graph. Such a cycle is called a "Hamiltonian cycle". In this problem, you are supposed to tell if a given cycle is a H…