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The zip function in Python 3 takes two parameters, and generate an iterator that contains tuples. Each tuple takes a value from each input – which can be tuples …
The k-digit number N is an Armstrong number if and only if the k-th power of each digit sums to N. Given a positive integer N, return true if …
Given an array of integers A, return the largest integer that only occurs once. If no integer occurs once, return -1. Example 1: Input: Output: 8 Explanation: The maximum …
Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. For example, given n = 3, a solution set is: We can use the …
Given two sparse matrices A and B, return the result of AB. You may assume that A’s column number is equal to B’s row number. Example: Input: A = …