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leetcode - Permutations
Given a collection of numbers, return all possible permutations. For example, [1,2,3] have the following permutations: [1,2,3], [1,3,2], [2,1,3], [2,3,1], [3,1,2], and [3,2,1]. class Solutio...
分类:其他好文   时间:2014-10-23 12:33:50    阅读次数:223
leetcode - Permutations II
Given a collection of numbers that might contain duplicates, return all possible unique permutations. For example, [1,1,2] have the following unique permutations: [1,1,2], [1,2,1], and [2,1,1]....
分类:其他好文   时间:2014-10-23 12:29:48    阅读次数:136
Exercise 1.19 Fast Fibonacci
题目:There is a clever algorithm for computing the Fibonacci numbers in a logarithmic number of steps.Recall the transformation of the state variables a...
分类:其他好文   时间:2014-10-22 17:46:46    阅读次数:108
Decode Ways
A message containing letters fromA-Zis being encoded to numbers using the following mapping:'A' -> 1'B' -> 2...'Z' -> 26Given an encoded message conta...
分类:其他好文   时间:2014-10-22 14:15:29    阅读次数:134
leetcode第30题--Next Permutation
problem:Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.If such arrangement is not...
分类:其他好文   时间:2014-10-22 06:18:10    阅读次数:149
SOJ - 11598
11598. XORConstraintsTime Limit: 1 secs, Memory Limit: 256 MBDescriptionGiven two integersSandF, what is the XOR (exclusive-or) of all numbers between...
分类:其他好文   时间:2014-10-21 22:59:43    阅读次数:438
LeetCode Two Sum
Two Sum Total Accepted: 37848 Total Submissions: 206006 Given an array of integers, find two numbers such that they add up to a specific target number. The function twoSum should return ...
分类:其他好文   时间:2014-10-21 21:44:10    阅读次数:267
HDU 1711 Number Sequence(kmp)
Problem Description Given two sequences of numbers : a[1], a[2], ...... , a[N], and b[1], b[2], ...... , b[M] (1 <= M <= 10000, 1 <= N <= 1000000). Your task is to find a number K which make a[K] = b...
分类:其他好文   时间:2014-10-21 21:38:27    阅读次数:258
Combination Sum
[leetcode]Given a set of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T.The same repeated number may be chosen from C unlimited number of times....
分类:其他好文   时间:2014-10-21 12:22:27    阅读次数:170
poj - 1338 - Ugly Numbers(优先队列)
题意:问第n(n 题目链接:http://poj.org/problem?id=1338 ——>>1, 2, 3, 4, 5, 6, 8, ... 假设小根堆存以上丑数,那么每次取出最小的数,这个最小的数nMin,它可以生成三个数:nMin * 2, nMin * 3, nMin * 5,将这三个数放入小根堆继续,一直复筛出1500个丑数为止。 小根堆可用优先队列来替代。 #inclu...
分类:其他好文   时间:2014-10-21 10:21:52    阅读次数:215
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