1.Given a binary tree and a sum, determine if the tree has a root-to-leaf path such tha...
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[LeetCode]
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算法概率课后题 8.14
Ex.8.14 Prove that the following problem is NP-complete: given an undirected graph G = ...
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[LeetCode] Minimum Depth of Binary Tree
1.Given a binary tree, find its minimum depth. The minimum depth is the number of nodes...
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[LeetCode] Symmetric Tree
1.Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its...
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[LeetCode] Sqrt(x)
1.Implement int sqrt(int x).Compute and return the square root of x.x is guaranteed to ...
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[LeetCode] Merge Sorted Array
1.Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted...
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[LeetCode] Implement strStr()
1.Return the index of the first occurrence of needle in haystack, or -1 if needle is no...
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[LeetCode] Remove Element
1.Given an array and a value, remove all instances of that value in-place and return th...
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[LeetCode] Merge Two Sorted Lists
1.Merge two sorted linked lists and return it as a new list. The new list should be mad...
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[LeetCode] Pascal's Triangle
1.Given numRows, generate the first numRows of Pascal's triangle. For example, given nu...
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[LeetCode] Length of Last Word
1.Given a string s consists of upper/lower-case alphabets and empty space characters ' ...
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[LeetCode] Valid Parentheses
1.Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determ...
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[LeetCode] Palindrome Number
1.Determine whether an integer is a palindrome. Do this without extra space. Some hints...
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[LeetCode] Same Tree
1.Given two binary trees, write a function to check if they are equal or not. Two binar...
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[LeetCode] Climbing Stairs
1.You are climbing a stair case. It takes n steps to reach to the top. Each time you ca...
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[LeetCode] Count and Say
1.The count-and-say sequence is the sequence of integers with the first five terms as f...
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[LeetCode] Search Insert Position
1.Given a sorted array and a target value, return the index if the target is found. If ...
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[LeetCode] Reverse Integer
1.Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return...
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