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链表结点类型定义：1 class Node {2 public:3 int data = 0;4 Node *next = nullptr;5 6 Node(int d) {7 data = d;8 }9 };快行指针(runner)技巧：同时... 阅读全文
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Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum.For example:Given the below binary tree andsum =... 阅读全文
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Given a stringsconsists of upper/lower-case alphabets and empty space characters' ', return the length of last word in the string.If the last word doe... 阅读全文
摘要：
Given a linked list and a valuex, partition it such that all nodes less thanxcome before nodes greater than or equal tox.You should preserve the origi... 阅读全文