强风吹拂

摘要： Being unique is so important to people on Mars that even their lottery is designed in a unique way. The rule of winning is simple: one bets on a numbe 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： To prepare for PAT, the judge sometimes has to generate random passwords for the users. The problem is that there are always some confusing passwords 阅读全文

摘要： Given two strings S​1​​ and S​2​​, S=S​1​​−S​2​​ is defined to be the remaining string after taking all the characters in S​2​​ from S​1​​. Your task 阅读全文

摘要： A traveler's map gives the distances between cities along the highways, together with the cost of each highway. Now you are supposed to write a progra 阅读全文

摘要： Given an increasing sequence S of N integers, the median is the number at the middle position. For example, the median of S1 = { 11, 12, 13, 14 } is 1 阅读全文

摘要： Excel can sort records according to any column. Now you are supposed to imitate this function. Input Specification: Each input file contains one test 阅读全文

摘要： A number that will be the same when it is written forwards or backwards is known as a Palindromic Number. For example, 1234321 is a palindromic number 阅读全文

摘要： Given any string of N (≥) characters, you are asked to form the characters into the shape of U. For example, helloworld can be printed as: h d e l l r 阅读全文

摘要： 模板： //树状数组 解决动态前缀和问题的数据结构 //树状数组单词查询 int d[maxn],n; //返回最后一个1的下标 int lowbit(int x){ return x&(-x); } //查询 int query(int x){ int res=0; while(x){ res+= 阅读全文