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Given a List of words, return the words that can be typed using letters of alphabet on only one row’s of American keyboard like the image below. Examp 阅读全文
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You are given two arrays (without duplicates) nums1 and nums2 where nums1’s elements are subset of nums2. Find all the next greater numbers for nums1‘ 阅读全文
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You are given a list of non negative integers, a1, a2, ..., an, and a target, S. Now you have 2 symbols + and . For each integer, you should choose on 阅读全文
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For a web developer, it is very important to know how to design a web page’s size. So, given a specific rectangular web page’s area, your job by now i 阅读全文
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Given an array of scores that are non negative integers. Player 1 picks one of the numbers from either end of the array followed by the player 2 and t 阅读全文
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Given a binary array, find the maximum number of consecutive 1s in this array. Example 1: Note: + The input array will only contain 0 and 1. + The len 阅读全文
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Given a positive integer, output its complement number. The complement strategy is to flip the bits of its binary representation. Note: + The given in 阅读全文
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In the computer world, use restricted resource you have to generate maximum benefit is what we always want to pursue. For now, suppose you are a domin 阅读全文
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Consider the string s to be the infinite wraparound string of “abcdefghijklmnopqrstuvwxyz”, so s will look like this: “…zabcdefghijklmnopqrstuvwxyzabc 阅读全文
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In the “100 game,” two players take turns adding, to a running total, any integer from 1..10. The player who first causes the running total to reach o 阅读全文
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You are given a map in form of a two dimensional integer grid where 1 represents land and 0 represents water. Grid cells are connected horizontally/ve 阅读全文
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The Hamming distance between two integers is the number of positions at which the corresponding bits are different. Given two integers x and y, calcul 阅读全文
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There are 1000 buckets, one and only one of them contains poison, the rest are filled with water. They all look the same. If a pig drinks that poison 阅读全文
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Assume you are an awesome parent and want to give your children some cookies. But, you should give each child at most one cookie. Each child i has a g 阅读全文
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Given a non empty integer array of size n, find the minimum number of moves required to make all array elements equal, where a move is incrementing n 阅读全文
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Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] 阅读全文
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Given n points in the plane that are all pairwise distinct, a “boomerang” is a tuple of points (i, j, k) such that the distance between iand j equals 阅读全文
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Given a non empty array containing only positive integers, find if the array can be partitioned into two subsets such that the sum of elements in both 阅读全文
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Given two non negative integers num1 and num2 represented as string, return the sum of num1 and num2. Note: + The length of both num1 and num2 is =0; 阅读全文
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A sequence of number is called arithmetic if it consists of at least three elements and if the difference between any two consecutive elements is the 阅读全文