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Combinations leetcode java
题目:Given two integers n and k, return all possible combinations of k numbers out of 1 ... n.For example,If n = 4 and k = 2, a solution is:[ [2,4], ...
分类:编程语言   时间:2014-07-30 09:58:03    阅读次数:218
codeforces 17A Noldbach problem
Noldbach problem time limit per test 2 seconds memory limit per test 64 megabytes input standard input output standard output Nick is interested in prime numbers. Once h...
分类:数据库   时间:2014-07-30 01:07:23    阅读次数:308
UVa 401 Palindromes(字符串,回文)
Palindromes  A regular palindrome is a string of numbers or letters that is the same forward as backward. For example, the string "ABCDEDCBA" is a palindrome because it is the same when t...
分类:其他好文   时间:2014-07-29 21:57:12    阅读次数:308
C++ Notes 1 - size_type - Accelerated Ch3
1. 为什么用string::size_type而不是int?--Why usestring::size_type?intis supposed to work! it holds numbers!--A short holds numbers too. So does a signed char....
分类:编程语言   时间:2014-07-29 17:37:52    阅读次数:278
LeetCode : add two numbers
解法:比较简单,用plus表示进位 1 /** 2 * Definition for singly-linked list. 3 * struct ListNode { 4 * int val; 5 * ListNode *next; 6 * ListNode(in...
分类:其他好文   时间:2014-07-29 10:53:06    阅读次数:273
Codeforces 237C
题目:DescriptionYou've decided to carry out a survey in the theory of prime numbers. Let us remind you that a prime number is a positive integer that ha...
分类:其他好文   时间:2014-07-29 10:25:58    阅读次数:395
HDU-4879-ZCC loves march(map+set+并查集)
Description On a m*m land stationed n troops, numbered from 1 to n. The i-th troop's position can be described by two numbers (xi,yi) (1 Then there are t minutes, in each minute one of the followi...
分类:其他好文   时间:2014-07-28 16:25:13    阅读次数:356
uva10344 - 23 out of 5
Your task is to write a program that can decide whether you can find an arithmetic expression consisting of five given numbers (1 {1,2,3,4,5} is a bij...
分类:其他好文   时间:2014-07-28 15:33:03    阅读次数:230
LeetCode "First Missing Positive"
Similar with "Longest Consecutive Sequence". Another usage to hashset.Take care of corner cases!class Solution {public: int firstMissingPositive(in...
分类:其他好文   时间:2014-07-28 15:16:43    阅读次数:206
按值和按引用的比较
在 JScript 中,对数据的处理取决于该数据的类型。按值和按引用的比较Numbers 和 Boolean 类型的值 (true 和 false) 是按值来复制、传递和比较的。当按值复制或传递时,将在计算机内存中分配一块空间并将原值复制到其中。然后,即使更改原来的值,也不会影响所复制的值(反过来也...
分类:其他好文   时间:2014-07-28 11:25:20    阅读次数:259
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