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You are given a string, s, and a list of words, words, that are all of the same length. Find all starting indices of substring(s) in s that is a conca 阅读全文
posted @ 2016-08-08 02:47
北叶青藤
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Given an integer n, count the total number of digit 1 appearing in all non-negative integers less than or equal to n. For example:Given n = 13,Return 阅读全文
posted @ 2016-08-07 11:48
北叶青藤
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Given a root node reference of a BST and a key, delete the node with the given key in the BST. Return the root node reference (possibly updated) of th 阅读全文
posted @ 2016-08-07 05:21
北叶青藤
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Given a binary search tree and a node in it, find the in-order successor of that node in the BST. 1 public class Solution { 2 3 public TreeNode inorde 阅读全文
posted @ 2016-08-07 00:05
北叶青藤
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Range Sum Query 2D - Mutable Given a 2D matrix matrix, find the sum of the elements inside the rectangle defined by its upper left corner (row1, col1) 阅读全文
posted @ 2016-08-06 23:13
北叶青藤
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Given two strings S and T, determine if they are both one edit distance apart. 分析：https://segmentfault.com/a/1190000003906621 虽然我们可以用Edit Distance的解法， 阅读全文
posted @ 2016-08-06 12:42
北叶青藤
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Suppose you are at a party with n people (labeled from 0 to n - 1) and among them, there may exist one celebrity. The definition of a celebrity is tha 阅读全文
posted @ 2016-08-06 11:19
北叶青藤
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Given an Iterator class interface with methods: next() and hasNext(), design and implement a PeekingIterator that support the peek()operation -- it es 阅读全文
posted @ 2016-08-06 08:26
北叶青藤
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Given two 1d vectors, implement an iterator to return their elements alternately. For example, given two 1d vectors: By calling next repeatedly until 阅读全文
posted @ 2016-08-06 06:14
北叶青藤
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Compare two version numbers version1 and version2.If version1 > version2 return 1, if version1 < version2 return -1, otherwise return 0. You may assum 阅读全文
posted @ 2016-08-06 05:51
北叶青藤
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