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Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array whic 阅读全文
posted @ 2017-10-25 20:15
daniel456
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Given an array of integers with possible duplicates, randomly output the index of a given target number. You can assume that the given target number m 阅读全文
posted @ 2017-10-25 20:09
daniel456
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Given a singly linked list, return a random node's value from the linked list. Each node must have the same probability of being chosen. Follow up:Wha 阅读全文
posted @ 2017-10-25 20:05
daniel456
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There are n bulbs that are initially off. You first turn on all the bulbs. Then, you turn off every second bulb. On the third round, you toggle every 阅读全文
posted @ 2017-10-25 19:59
daniel456
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You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns to remove 1 to 3 ston 阅读全文
posted @ 2017-10-25 19:56
daniel456
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Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive. The update(i, val) function modifies nums by upd 阅读全文
posted @ 2017-10-25 19:49
daniel456
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Given an unsorted array nums, reorder it such that nums[0] < nums[1] > nums[2] < nums[3].... Example:(1) Given nums = [1, 5, 1, 1, 6, 4], one possible 阅读全文
posted @ 2017-10-25 19:43
daniel456
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You are given an integer array nums and you have to return a new counts array. The counts array has the property where counts[i] is the number of smal 阅读全文
posted @ 2017-10-25 18:58
daniel456
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Given a string of numbers and operators, return all possible results from computing all the different possible ways to group numbers and operators. Th 阅读全文
posted @ 2017-10-25 18:55
daniel456
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Given a list of non negative integers, arrange them such that they form the largest number. For example, given [3, 30, 34, 5, 9], the largest formed n 阅读全文
posted @ 2017-10-25 18:49
daniel456
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