Rotate an array of n elements to the right by k steps. For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4]. Note:Try to come up as many solutions as you can, there are at least 3 different ways to solve this pro…

#189.    Rotate Array Rotate an array of n elements to the right by k steps. For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4]. Note: Try to come up as many solutions as you can, there are at least 3 different…

Rotate Array Rotate an array of n elements to the right by k steps. For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4]. Note: Try to come up as many solutions as you can, there are at least 3 different ways to…

Title: Given an input string, reverse the string word by word. For example,Given s = "the sky is blue",return "blue is sky the". https://leetcode.com/problems/reverse-words-in-a-string/ 思路:先将字符串全部逆转,在将每个单词逆转.具体实现,要注意空格,所以对字符串倒过来处理. cla…

Given an array, rotate the array to the right by k steps, where k is non-negative. Example 1: Input: [1,2,3,4,5,6,7] and k = 3 Output: [5,6,7,1,2,3,4] Explanation: rotate 1 steps to the right: [7,1,2,3,4,5,6] rotate 2 steps to the right: [6,7,1,2,3,4…

Given an array, rotate the array to the right by k steps, where k is non-negative. 给定一个数组,并且给定一个非负数的值k, 把数组往右旋转k步,要求不返回新的数组,直接改变原数组 例子1: 给定数组: [1,2,3,4,5,6,7] 给定 k = 3 输出数组: [5,6,7,1,2,3,4] 解析: 往右旋转1步: [7,1,2,3,4,5,6] 往右旋转2步: [6,7,1,2,3,4,5] 往右旋转3步:…

公众号:爱写bug(ID:icodebugs) 给定一个数组,将数组中的元素向右移动 k 个位置,其中 k 是非负数. Given an array, rotate the array to the right by k steps, where k is non-negative. 示例 1: 输入: [1,2,3,4,5,6,7] 和 k = 3 输出: [5,6,7,1,2,3,4] 解释: 向右旋转 1 步: [7,1,2,3,4,5,6] 向右旋转 2 步: [6,7,1,2,3,4,…

Given an array, rotate the array to the right by k steps, where k is non-negative. Example 1: Input: [1,2,3,4,5,6,7] and k = 3 Output: [5,6,7,1,2,3,4] Explanation: rotate 1 steps to the right: [7,1,2,3,4,5,6] rotate 2 steps to the right: [6,7,1,2,3,4…

189. Rotate Array Easy Given an array, rotate the array to the right by k steps, where k is non-negative. Example 1: Input: [1,2,3,4,5,6,7] and k = 3 Output: [5,6,7,1,2,3,4] Explanation: rotate 1 steps to the right: [7,1,2,3,4,5,6] rotate 2 steps to…

问题描述: Given an array, rotate the array to the right by k steps, where k is non-negative. Example 1: Input: [1,2,3,4,5,6,7] and k = 3 Output: [5,6,7,1,2,3,4] Explanation: rotate 1 steps to the right: [7,1,2,3,4,5,6] rotate 2 steps to the right: [6,7,1…

---恢复内容开始--- Description Given an array, rotate the array to the right by k steps, where k is non-negative. Example 1: Input: [1,2,3,4,5,6,7] and k = 3 Output: [5,6,7,1,2,3,4] Explanation: rotate 1 steps to the right: [7,1,2,3,4,5,6] rotate 2 steps t…

问题 该文章的最新版本已迁移至个人博客[比特飞],单击链接 https://www.byteflying.com/archives/3700 访问. 给定一个数组,将数组中的元素向右移动 k 个位置,其中 k 是非负数. 输入: [1,2,3,4,5,6,7] 和 k = 3 输出: [5,6,7,1,2,3,4] 解释: 向右旋转 1 步: [7,1,2,3,4,5,6] 向右旋转 2 步: [6,7,1,2,3,4,5] 向右旋转 3 步: [5,6,7,1,2,3,4] 输入: [-1,-…

As usual Babul is again back with his problem and now with numbers. He thought of an array of numbers in which he does two types of operation that is rotation and deletion. His process of doing these 2 operations are that he first rotates the array i…

在 C++ 中,你也许经常使用 new 和 delete 来动态申请和释放内存,但你可曾想过以下问题呢? new 和 delete 是函数吗? new [] 和 delete [] 又是什么?什么时候用它们? 你知道 operator new 和 operator delete 吗? 为什么 new [] 出来的数组有时可以用 delete 释放有时又不行? … 如果你对这些问题都有疑问的话,不妨看看我这篇文章. new 和 delete 到底是什么? 如果找工作的同学看一些面试的书,我相信都会…

414. Third Maximum Number 给一个非空的整数数组,找到这个数组中第三大的值,如果不存在,那么返回最大的值.要求时间复杂度为o(n) 例如: Example 1: Input: [3, 2, 1] Output: 1 Explanation: The third maximum is 1. Example 2: Input: [1, 2] Output: 2 Explanation: The third maximum does not exist, so the maxi…

在 C++ 中,你也许经常使用 new 和 delete 来动态申请和释放内存,但你可曾想过以下问题呢? new 和 delete 是函数吗? new [] 和 delete [] 又是什么?什么时候用它们? 你知道 operator new 和 operator delete 吗? 为什么 new [] 出来的数组有时可以用 delete 释放有时又不行? … 如果你对这些问题都有疑问的话,不妨看看我这篇文章. new 和 delete 到底是什么? 如果找工作的同学看一些面试的书,我相信都会…

http://www.cnblogs.com/hazir/p/new_and_delete.html 在 C++ 中,你也许经常使用 new 和 delete 来动态申请和释放内存,但你可曾想过以下问题呢? new 和 delete 是函数吗? new [] 和 delete [] 又是什么?什么时候用它们? 你知道 operator new 和 operator delete 吗? 为什么 new [] 出来的数组有时可以用 delete 释放有时又不行? - 如果你对这些问题都有疑问的话,不…

operator new和operator delete函数有两个重载版本: void* operator new (size_t); // allocate an object void* operator new [] (size_t); // allocate an array void operator delete (void*); // free an oject void operator delete [] (void*); // free an array new new操作针…

转:http://www.cnblogs.com/hazir/p/new_and_delete.html 在 C++ 中,你也许经常使用 new 和 delete 来动态申请和释放内存,但你可曾想过以下问题呢? new 和 delete 是函数吗? new [] 和 delete [] 又是什么?什么时候用它们? 你知道 operator new 和 operator delete 吗? 为什么 new [] 出来的数组有时可以用 delete 释放有时又不行? … 如果你对这些问题都有疑问的话…

浅谈 C++ 中的 new/delete 和 new[]/delete[]   在 C++ 中,你也许经常使用 new 和 delete 来动态申请和释放内存,但你可曾想过以下问题呢? new 和 delete 是函数吗? new [] 和 delete [] 又是什么?什么时候用它们? 你知道 operator new 和 operator delete 吗? 为什么 new [] 出来的数组有时可以用 delete 释放有时又不行? - 如果你对这些问题都有疑问的话,不妨看看我这篇文章. n…

C++中程序存储空间除栈空间和静态区外,每个程序还拥有一个内存池,这部分内存被称为自由空间(free store)或堆(heap).程序用堆来存储动态分配的对象,即,那些程序运行时分配的对象.动态对象的生存期由程序来控制 ,当动态对象不再使用时,程序必须显式的销毁它们. new和delete的使用 C++中通过一对运算符new和delete来完成动态内存分配.new,在动态内存中为对象分配空间并返回一个指向该对象的指针,我们可以选择对对象初始化:delete接受一个动态对象的指针,销毁对象,并释…

首先,new,delete都是c++的关键字并不是函数,通过特定的语法组成表达式,new可以在编译的时候确定其返回值.可以直接使用string *p=new string("asdfgh");来直接赋值.这其中在调用new分配空间得时候的时候,系统其实直接调用了类或结构的构造函数来对对其进行赋值,这个过程就相当于是string p=string("asdfgh"); 或者string p("asdfgh");(其实上面的过程还是有一定的不同之处:…

不同于C语言中的malloc/free是库函数,C++语言中的new/delete是运算符,而不是库函数. new/delete执行流程 我们经常会接触到的是new/delete operator(就是new/delete运算符).其中new operator背后会调用operator new和placement new函数,而delete operator背后会调用operator delete函数. 对于new operator而言,它的执行流程为: 1)通过operator new函数申请…

C++中程序存储空间除栈空间和静态区外,每个程序还拥有一个内存池,这部分内存被称为或堆(heap).程序可以用堆来存储动态分配的对象,即那些在程序运行时创建的对象.动态对象的生存期由程序来控制 ,当动态对象不再使用时,程序必须显式的销毁它们.new操作符就是从自由存储区上为对象动态分配内存空间的.这里的自由存储区可以是堆,或者静态区. 1.new和delete的使用 C++中通过一对运算符new和delete来完成动态内存分配.new,在动态内存中为对象分配空间并返回一个指向该对象的指针,我们可…

如果debug调试的时候中断总是停在析构函数的delete[] p上,那可能 有两种情况: 1.调用析构函数的这个对象没有被分配空间,先找到调用调用析构函数出错的这个对象, 然后查看它是否被分配了空间,有可能你觉得你分配了,但实际上没有. 2.你给这个动态对象只分配了N个单元的空间,但是却给超过N-1的下标的单元赋了值,也就是越界了,假设你一共赋值了N + 2个单元,这时, 当执行delete[]p这条语句时,delete就会释放N+ 2个单元,所以多释放了3个单元的空间当然会程序崩溃了. 例如…

和 sizeof 类似,sizeof不是函数,它是一个操作符,它在编译期就完成了计算,在函数运行期间它已经是一个常数值了. int a; sizeof(int) = 4; sizeof(a) = 4; sizeof a ——也是4  不需要括号!   此时要注意: sizeof int——错误!此时int  把sizeof当成int的修饰词:比如  signed int ,  register int ... new 和 delete 也不是函数,它们都是 C++ 定义的关键字,通过特定的语法可…

From:https://stackoverflow.com/questions/18273370/the-correct-way-to-initialize-a-dynamic-pointer-to-a-multidimensional-array Let's start with some basic examples. When you say int *P = new int[4]; new int[4]; calls operator new function() allocates…

122. Best Time to Buy and Sell Stock II Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may complete as many transactions as you like (ie, buy one and sell on…

operator new 和 operator delete函数有两个重载版本,每个版本支持相关的new表达式和delete表达式: void* operator new (size_t); // allocate an objectvoid* operator new [] (size_t); // allocate an array void operator delete (void*); // free an ojectvoid operator delete [] (void*); /…

Rotate ImageYou are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Follow up:Could you do this in-place? SOLUTION 1: 我们可以把它当作多个嵌套的环来处理,一环加一环.从外环处理到内环.为了方便处理各种下标,我们定义top, bottom, left, right来限制环的左右上下边界. 1.…