Phoebe815

摘要： A message containing letters fromA-Zis being encoded to numbers using the following mapping:'A' -> 1'B' -> 2...'Z' -> 26Given an encoded message conta... 阅读全文

摘要： http://www.acmerblog.com/leetcode-lru-cache-lru-5745.htmlhttps://oj.leetcode.com/discuss/1188/java-is-linkedhashmap-considered-cheatinghttp://docs.ora... 阅读全文

摘要： （转）http://www.cnblogs.com/hubingxu/archive/2012/02/21/2361281.htmlimportjava.util.HashMap;importjava.util.Iterator;importjava.util.LinkedHashMap;impor... 阅读全文

摘要： http://book.douban.com/annotation/15154366/Q: java.util.Arrays 中使用的 sort 采用的是什么算法？A: java中Arrays.sort使用了两种排序方法，quick sort 和优化的 merge sort。Q: 为什么采用两种排序... 阅读全文

摘要： Follow up for "Remove Duplicates":What if duplicates are allowed at mosttwice?For example,Given sorted array A =[1,1,1,2,2,3],Your function should ret... 阅读全文

摘要： Table:Person+-------------+---------+| Column Name | Type |+-------------+---------+| PersonId | int || FirstName | varchar || LastName ... 阅读全文

摘要： Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.If such arrangement is not possibl... 阅读全文

摘要： Given an unsorted array, find the maximum difference between the successive elements in its sorted form.Try to solve it in linear time/space.Return 0 ... 阅读全文

摘要： Design a stack that supports push, pop, top, and retrieving the minimum element in constant time.push(x) -- Push element x onto stack.pop() -- Removes... 阅读全文

摘要： Write a program to solve a Sudoku puzzle by filling the empty cells.Empty cells are indicated by the character'.'.You may assume that there will be on... 阅读全文