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[LeetCode] 371. Sum of Two Integers
两整数之和。题意是不用加减法做到对两个整数求和。思路是位运算,但是非常难想,需要复习。我是参考了这个帖子才想通了的。 ab低位进位 0 0 0 0 1 0 1 0 0 1 1 0 1 1 0 1 首先注意到,任意两个数字a和b相加的时候,他们的低位和高位的结果是什么?如上图所示,你会发现一个规律,低 ...
分类:其他好文   时间:2020-04-30 13:14:31    阅读次数:53
[LeetCode] 942. DI String Match 增减DI字符串匹配
Given a string that?only?contains "I" (increase) or "D" (decrease), let . Return?any?permutation of such that for all : If , then Example 1: Example 2 ...
分类:其他好文   时间:2020-04-30 10:00:11    阅读次数:88
581. Shortest Unsorted Continuous Subarray
Problem : Given an integer array, you need to find one continuous subarray that if you only sort this subarray in ascending order, then the whole arra ...
分类:其他好文   时间:2020-04-29 23:08:17    阅读次数:65
3. Longest Substring Without Repeating Characters
Problem : Given a string, find the length of the longest substring without repeating characters. Example 1: Example 2: Example 3: 思路 : Solution (C++) ...
分类:其他好文   时间:2020-04-29 21:42:00    阅读次数:51
golang.erros
package builtintype error interface { Error() string }######################error接口定义 package errors // New returns an error that formats as the given ...
分类:其他好文   时间:2020-04-29 20:14:15    阅读次数:68
Leetcode swap-nodes-in-pairs(链表 交换相邻节点)
题目描述 将给定的链表中每两个相邻的节点交换一次,返回链表的头指针例如,给出1->2->3->4,你应该返回链表2->1->4->3。你给出的算法只能使用常量级的空间。你不能修改列表中的值,只能修改节点本身。 Given a linked list, swap every two adjacent ...
分类:其他好文   时间:2020-04-29 00:52:16    阅读次数:76
二分二分二分——无名氏(题目名忘了)
题目英文版: The only difference between the easy and the hard versions is the maximum value of k. You are given an infinite sequence of form "1121231234123 ...
分类:其他好文   时间:2020-04-28 12:33:44    阅读次数:91
1105 Spiral Matrix
This time your job is to fill a sequence of N positive integers into a spiral matrix in non-increasing order. A spiral matrix is filled in from the fi ...
分类:其他好文   时间:2020-04-28 00:48:51    阅读次数:67
cf1216E2 Numerical Sequence (hard version) 二分查找、思维题
题目描述 The only difference between the easy and the hard versions is the maximum value of k. You are given an infinite sequence of form "112123123412345 ...
分类:其他好文   时间:2020-04-27 22:17:24    阅读次数:94
[LeetCode] 941. Valid Mountain Array 验证山形数组
Given an array of integers, return if and only if it is a valid mountain array . Recall that A is a mountain array if and only if: There exists some w ...
分类:编程语言   时间:2020-04-27 10:02:23    阅读次数:120
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