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题目Given an unsorted array, find the maximum difference between the successive elements in its sorted form.Try to solve it in linear time/spac... 阅读全文
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题目A peak element is an element that is greater than its neighbors.Given an input array where num[i] ≠ num[i+1], find a peak element and retur... 阅读全文
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题目Given a positive integer, return its corresponding column title as appear in an Excel sheet.For example:1 -> A2 -> B3 -> C...26 -> Z27 -> A... 阅读全文
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题目Given a 2D matrix matrix, find the sum of the elements inside the rectangle defined by its upper left corner (row1, col1) and lower right c... 阅读全文
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题目Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive.Example:Given nums = [-2, 0, 3, -5, 2,... 阅读全文
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题目Given a singly linked list, determine if it is a palindrome.Follow up: Could you do it in O(n) time and O(1) space?分析判断一个链表是否为回文。要求时间复杂度O(n... 阅读全文
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题目Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice... 阅读全文
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