Happiness is more than pleasure without pain

Problem StatementJohn 发现了很多种岩石。每种岩石都有一个独一无二成分:由小写英文字母组成。宝石是由一个单一的字符组成,并且将在所有岩石中出现。给出一些岩石的成分,输出有多少种不同的宝石存在。输入格式 第一行包含一个整数 N, 代表岩石的个数 接下来的N行,每行包含岩石的构成,由小写的英文字母组成。输出格式 输出有多少种不同的

Problem StatementThis problem is a programming version of Problem 77 from projecteuler.netIt is possible to write ten as the sum of primes in exactly five different ways:7+35+55+3+23

Problem StatementThis challenge is part of a tutorial track by MyCodeSchoolYou’re given the pointer to the head nodes of two sorted linked lists. The data in both lists will be sorted in

import java.io.*;import java.util.*;import java.text.*;import java.math.*;import java.util.regex.*;public class Solution { static int LCS(String a,String b){ int sa=a.length();

Problem StatementThis challenge is part of a tutorial track by MyCodeSchool and is accompanied by a video lesson.You’re given the pointer to the head node of a linked list. Change the ne

Problem Statement给定两个整数：L 和 R∀ L ≤ A ≤ B ≤ R, 找出 A xor B 的最大值。输入格式第一行为 L 第二行为 R数据范围1 ≤ L ≤ R ≤ 103输出格式输出最大的异或和样例输入110样例输出15样例解释当B = 10, A =

Problem StatementSid is obsessed with reading short stories. Being a CS student, he is doing some interesting frequency analysis with the books. He chooses strings S1 and S2 in such a way th

Problem StatementShashank非常喜欢字符串，特别是那些连续字符都是不一样的字符串。比如：他喜欢ABABA,但他不喜欢ABAA。给定一个字符串，该字符串只可能由字母A和B组成。Shashank想把这个字符串转变成他喜欢的字符串，在转变的过程中，他允许删除字符串中的某些字符。 你的任务就是找出最少需要删除几个字符，才能把给定的字符串转变成Shashank喜欢的

Problem StatementChinese VersionRussian VersionAlice recently started learning about cryptography and found that anagrams are very useful. Two strings are anagrams of each other if the

Problem StatementA series is defined in the following manner:Given the nth and (n+1)th terms, the (n+2)th can be computed by the following relation Tn+2 = (Tn+1)2 + TnSo, i