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ZigZag Conversion
题目: zigzag,就是锯齿状的数字顺序,其形式就是首尾行间断的比内部行少一个,就是下面的形式。 1     *     7                                        2    6     8     12 3    5    9      11 4     *   10 更好看点就是  1                      7 2  ...
分类:其他好文   时间:2014-05-19 22:43:12    阅读次数:373
【Leetcode】Valid Parentheses
Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()[]{}" are all vali...
分类:其他好文   时间:2014-05-18 15:11:17    阅读次数:249
LeetCode: Divide Two Integers [028]
【题目】 Divide two integers without using multiplication, division and mod operator. 【题意】 计算两个数的商,不能使用乘、除、取余操作 【思路】 用加法,确定多少除数相加其和恰好<=被除数 为了提高算法效率,利用贪心思想,采用滚雪球式的翻倍叠加策略,使和快速逼近被除数 集中特殊情况需要注意: 1. 结果是负数 ...
分类:其他好文   时间:2014-05-18 10:42:00    阅读次数:259
LeetCode: Next Permutation [030]
【题目】 Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers. If such arrangement is not possible, it must rearrange it as the lowest possible order (ie, sorted in ascending order). The replac...
分类:其他好文   时间:2014-05-18 09:54:53    阅读次数:242
LeetCode: Substring with Concatenation of All Words [029]
【题目】 You are given a string, S, and a list of words, L, that are all of the same length. Find all starting indices of substring(s) in S that is a concatenation of each word in L exactly once and without any intervening characters. For example, given: S:...
分类:其他好文   时间:2014-05-18 08:31:48    阅读次数:228
LeetCode:Evaluate Reverse Polish Notation
题意:            Evaluate the value of an arithmetic expression in Reverse Polish Notation.        Valid operators are +, -, *, /. Each operand may be an integer or another expression.        So...
分类:其他好文   时间:2014-05-18 08:09:15    阅读次数:190
【LeetCode】Longest Consecutive Sequence
Given an unsorted array of integers, find the length of the longest consecutive elements sequence.For example,Given[100, 4, 200, 1, 3, 2],The longest ...
分类:其他好文   时间:2014-05-18 01:52:45    阅读次数:317
Leetcode | Remove Duplicates from Sorted List I && II
Remove Duplicates from Sorted List IGiven a sorted linked list, delete all duplicates such that each element appear only once.For example,Given 1->1->...
分类:其他好文   时间:2014-05-18 01:41:31    阅读次数:361
【LeetCode】Multiply Strings
Given two numbers represented as strings, return multiplication of the numbers as a string.Note: The numbers can be arbitrarily large and are non-nega...
分类:其他好文   时间:2014-05-18 01:25:07    阅读次数:288
Leetcode | Next Permutation
Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.If such arrangement is not possibl...
分类:其他好文   时间:2014-05-17 23:39:30    阅读次数:272
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