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Given the root of a binary tree, return the level order traversal of its nodes' values. (i.e., from left to right, level by level). Example 1: Input:...
Roman numerals are represented by seven different symbols: I, V, X, L, C, D, and M. Symbol Value I 1 V 5 X ...
Leetcode problem number: 18 ยท Given an array nums of n integers, return an array of all the unique quadruplets [nums[a], nums[b], nums[c], nums[d]] such...
Given an integer array nums of length n and an integer target, find three integers in nums such that the sum is closest to the target. Return the sum...
Given two sorted arrays nums1 and nums2 of size m and n respectively, return the median of the two sorted arrays. The overall run time complexity...
Given two sorted integer arrays A and B, merge B into A as one sorted array. Note: You have to modify the array A to contain the merge of A and B. Do...
