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Prompt: Given a string s which represents an expression, evaluate this expression and return its value. [Read More]

Prompt: Given a binary tree’s root node, return all levels of the binary tree in list form. [Read More]

Prompt: Given a linked list’s head and two integers, left and right, return the linked list where the nodes from left to right are reversed. The constraints on left and right is left <= right. [Read More]

Prompt: Given a string s and an array of strings words, return the number of words[i] that is a subsequence of s. [Read More]

Prompt: Given an m x n integer matrix matrix, if an element is 0, set its entire row and column to 0’s, and return the matrix. You must do it in place. [Read More]