摘要： size_t和ptrdiff_t常常用来指示数组长度。size_t常用于表示数组的大小，可以一般的将他看为typedefunsignedintsize_t，实质是一个无符号整形。包含在头文件“stddef.h”中。ptrdiff_t常用来保存两个指针减法的结果，常常被定义为long int类型。 阅读全文

摘要： Given a linked list, return the node where the cycle begins. If there is no cycle, returnnull.Note:Do not modify the linked list.Follow up:Can you sol... 阅读全文

摘要： Given a linked list, determine if it has a cycle in it. 1 /** 2 * Definition for singly-linked list. 3 * struct ListNode { 4 * int val; 5 * ... 阅读全文

摘要： Write an efficient algorithm that searches for a value in anmxnmatrix. This matrix has the following properties:Integers in each row are sorted from l... 阅读全文

摘要： You are climbing a stair case. It takesnsteps to reach to the top.Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb... 阅读全文

摘要： Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum.Fo... 阅读全文

摘要： Implement strStr().Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. 1 class Solution { 2 publ... 阅读全文

摘要： Given an array and a value, remove all instances of that value in place and return the new length.The order of elements can be changed. It doesn't mat... 阅读全文

摘要： Write a program to find the node at which the intersection of two singly linked lists begins.For example, the following two linked lists:A: a... 阅读全文

摘要： Reverse a singly linked list./** * Definition for singly-linked list. * struct ListNode { * int val; * ListNode *next; * ListNode(int x) :... 阅读全文