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LeetCode: 98. Validate Binary Search Tree

LeetCode: 98. Validate Binary Search Tree 题目描述 Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as...

LeetCode

2018-03-19

0 555

LeetCode: 95. Unique Binary Search Trees II

LeetCode: 95. Unique Binary Search Trees II 题目描述 Given an integer n, generate all structurally unique BST’s (binary search trees) that store values ...

leetcode

2018-03-19

0 519

LeetCode: 94. Binary Tree Inorder Traversal

LeetCode: 94. Binary Tree Inorder Traversal 题目描述 Given a binary tree, return the inorder traversal of its nodes’ values. For example: Given binary...

LeetCode

2018-03-18

0 542

LeetCode: 93. Restore IP Addresses

LeetCode: 93. Restore IP Addresses 题目描述 Given a string containing only digits, restore it by returning all possible valid IP address combinations. ...

LeetCode

2018-03-18

0 484

LeetCode: 92. Reverse Linked List II

LeetCode: 92. Reverse Linked List II 题目描述 Reverse a linked list from position m to n. Do it in-place and in one-pass. For example: Given 1->2-&...

LeetCode

2018-03-18

0 486

LeetCode: 91. Decode Ways

LeetCode: 91. Decode Ways 题目描述 A message containing letters from A-Z is being encoded to numbers using the following mapping: 'A' -> 1 'B' ->...

2018-03-17

0 570

LeetCode:90. Subsets II

LeetCode: 90. Subsets II 题目描述 Given a collection of integers that might contain duplicates, nums, return all possible subsets (the power set). Note...

2018-03-16

0 444

LeetCode: 89. Gray Code

LeetCode:89. Gray Code 题目描述 The gray code is a binary numeral system where two successive values differ in only one bit. Given a non-negative integ...

2018-03-15

0 480

LeetCode: 88. Merge Sorted Array

LeetCode: 88. Merge Sorted Array 题目描述 Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array. Note: You may a...

LeetCode

2018-03-14

0 386

LeetCode: 87. Scramble String

LeetCode: 87. Scramble String 题目描述 Given a string s1, we may represent it as a binary tree by partitioning it to two non-empty substrings recursivel...

2018-03-13

0 512