摘要：Given a sequence of K integers { N1, N2, …, NK }. A continuous subsequence is defined to be { Ni, Ni+1, …, Nj } where 1 <= i <= j <= K. The Maximum Su 阅读全文

摘要：两个相等长度字符串都由数字组成，每次只能进行交换操作或加一操作或减一操作，求出使两个字符串相等的最少操作数。 思路： 1.两两判断交换之后操作少，还是不交换操作少。（不交换操作数为：对应数字差值的绝对值之和，交换的操作数为：交换之后对应数字差值的绝对值之和+1） 2.如果交换可以减少操作数，把交换后 阅读全文

摘要：This time you are asked to tell the difference between the lowest grade of all the male students and the highest grade of all the female students. Inp 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：一直想用java实现栈、队列，可是没时间，马上要找实习了，就复习了一下算法，实现了一个简单的栈，代码还是有问题的，有兴趣的兄弟帮忙改正 问题：多线程的话pop和push只能有一个方法被执行需要加互斥变量 阅读全文

摘要：1 package strategy; 2 /* 3 * 具体策略角色：高级会员 4 */ 5 public class AdvancedMemberStrategy implements MemberStrategy{ 6 7 @Override 8 public double discount( 阅读全文