jiang_1603的博客

The little cat is so famous, that many couples tramp over hill and dale to Byteland, and asked the little cat to give names to their newly-born babies. They seek the name, and at the same time seek th

Given two strings a and b we define a*b to be their concatenation. For example, if a = "abc" and b = "def" then a*b = "abcdef". If we think of concatenation as multiplication, exponentiation by a non-

For each prefix of a given string S with N characters (each character has an ASCII code between 97 and 126, inclusive), we want to know whether the prefix is a periodic string. That is, for each i (2

It is well known that AekdyCoin is good at string problems as well as number theory problems. When given a string s, we can write down all the non-empty prefixes of this string. For example:s: "abab

CC always becomes very depressed at the end of this month, he has checked his credit card yesterday, without any surprise, there are only 99.9 yuan left. he is too distressed and thinking about how to

有n个小朋友，每个小朋友手里有一些糖块，现在这些小朋友排成一排，编号是由1到n。现在给出m个数，能不能唯一的确定一对值l和r(l Input首先输入一个整数n，代表有n个小朋友。下一行输入n个数，分别代表每个小朋友手里糖的数量。之后再输入一个整数m，代表下面有m个数。下一行输入这m个数。Output 如果能唯一的确定一对l,r的值，那么输出这两个值，否则输出-1

Problem Description 我们都知道，前缀就是一个单词的前几个字母（长度小于单词长度）；后缀就是一个单词的后几个字母（长度小于单词长度）。例如：Hello，{H，He，Hel，Hell}都是Hello的前缀，{ello，llo，lo，o}都是Hello的后缀。现在，给你一个字符串String，你的任务是找出一个字串s，s既是String的前缀，又是String的后缀，并且s也出现在S