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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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Given an n-ary tree, return the level order traversal of its nodes' values. Nary-Tree input serialization is represented in their level order traversa 阅读全文
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Imagine you have an array like this (note that the array has duplicates, and includes 0 and k): a = [ 4, 64, 200, 42, 56, 22, 1, 64, 0, 161, 200, 0, 4 阅读全文
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Given a string s and an integer k, find out if the given string is a K-Palindrome or not. A string is K-Palindrome if it can be transformed into a pal 阅读全文
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Given a matrix, like this[[0, 0, 1, 1, 1][0, 1, 1, 1, 1][0, 0, 1, 1, 1][0, 0, 0, 0, 0]]each cell is either 1 or 0in each row, from left to right, when 阅读全文
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Given a string S of lowercase letters, a duplicate removal consists of choosing two adjacent and equal letters, and removing them. We repeatedly make 阅读全文
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Given a binary tree containing digits from 0-9 only, each root-to-leaf path could represent a number. An example is the root-to-leaf path 1->2->3 whic 阅读全文
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Given the root node of a binary search tree, return the sum of values of all nodes with value between L and R (inclusive). The binary search tree is g 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 < 5100 阅读全文