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In a given integer array nums, there is always exactly one largest element. Find whether the largest element in the array is at least twice as much as 阅读全文
posted @ 2018-04-06 22:41
bonelee
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Given a binary tree, return the bottom-up level order traversal of its nodes' values. (ie, from left to right, level by level from leaf to root). For 阅读全文
posted @ 2018-04-06 22:27
bonelee
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Given an unsorted array of integers, find the length of longest continuous increasing subsequence (subarray). Example 1: Input: [1,3,5,4,7] Output: 3 阅读全文
posted @ 2018-04-06 22:07
bonelee
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Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitted to complete at most one transaction 阅读全文
posted @ 2018-04-06 21:51
bonelee
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On a staircase, the i-th step has some non-negative cost cost[i] assigned (0 indexed). Once you pay the cost, you can either climb one or two steps. Y 阅读全文
posted @ 2018-04-06 21:16
bonelee
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Given a string and an integer k, you need to reverse the first k characters for every 2k characters counting from the start of the string. If there ar 阅读全文
posted @ 2018-04-06 20:47
bonelee
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Given an integer, return its base 7 string representation. Example 1: Input: 100 Output: "202" Example 2: Input: -7 Output: "-10" Note: The input will 阅读全文
posted @ 2018-04-06 20:18
bonelee
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Given two arrays, write a function to compute their intersection. Example: Given nums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2, 2]. Note: Each eleme 阅读全文
posted @ 2018-04-06 18:49
bonelee
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Given an array where elements are sorted in ascending order, convert it to a height balanced BST. For this problem, a height-balanced binary tree is d 阅读全文
posted @ 2018-04-06 18:40
bonelee
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Given a list of sorted characters letters containing only lowercase letters, and given a target letter target, find the smallest element in the list t 阅读全文
posted @ 2018-04-06 17:28
bonelee
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You are given a string representing an attendance record for a student. The record only contains the following three characters: A student could be re 阅读全文
posted @ 2018-04-06 12:54
bonelee
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Given an integer array, find three numbers whose product is maximum and output the maximum product. Example 1: Example 2: Note: 这个题目本质上是一个数学题，需要细心观察才可 阅读全文
posted @ 2018-04-06 12:12
bonelee
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