摘要： Given a constant K and a singly linked list L, you are supposed to reverse the links of every K elements on L. For example, given L being 1→2→3→4→5→6, 阅读全文

摘要： To store English words, one method is to use linked lists and store a word letter by letter. To save some space, we may let the words share the same s 阅读全文

摘要： 1068 Find More Coins (30)（30 分） Eva loves to collect coins from all over the universe, including some other planets like Mars. One day she visited a u 阅读全文

摘要： The task is simple: given any positive integer N, you are supposed to count the total number of 1's in the decimal form of the integers from 1 to N. F 阅读全文

摘要： Eva is trying to make her own color stripe out of a given one. She would like to keep only her favorite colors in her favorite order by cutting off th 阅读全文

摘要： 1.双链表中至多只有一个结点的后继指针为空（是）。 非循环双链表最后一个结点的后继指针为空； 循环双链表没有一个结点的后继指针为空； 综上，至多只有一个。（链表结构，也就是前驱节点，后继指针，以及本节点存储信息。） 2.在用邻接表表示图时，拓扑排序算法时间复杂度为( O(n+e))。//不是O(n* 阅读全文

摘要： 1040 Longest Symmetric String (25)（25 分） Given a string, you are supposed to output the length of the longest symmetric sub-string. For example, given 阅读全文

摘要： A gas station has to be built at such a location that the minimum distance between the station and any of the residential housing is as far away as po 阅读全文

摘要： 1.问题动机 图1.飞机发动机检测例子 对飞机引擎的例子，如果选取了两个特征x1热量产生度，x2震动强度。并得到如下的图，如果有一个新的引擎来检测其是否正常，x_test，那么此时如果点落在和其他点正常内，那么就显示是正常，不需要进一步的检测，但是如果在右下角绿色的，那么就是异常的，需要进一步地检测 阅读全文

摘要： Indeed there are many different tourist routes from our city to Rome. You are supposed to find your clients the route with the least cost while gainin 阅读全文