Question Link : https://leetcode.com/problems/maximum-units-on-a-truck/

Difficulty: Easy

Question

You are assigned to put some amount of boxes onto one truck. You are given a 2D array boxTypes, where boxTypes[i] = [numberOfBoxesi, numberOfUnitsPerBoxi]:

numberOfBoxesi is the number of boxes of type i. numberOfUnitsPerBoxi is the number of units in …

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Question Link : https://leetcode.com/problems/validate-stack-sequences/

Difficulty: Medium

Question

Given two integer arrays pushed and popped each with distinct values, return true if this could have been the result of a sequence of push and pop operations on an initially empty stack, or false otherwise.   Example 1:

Input: pushed …

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