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题目： Validate if a given string is numeric. Some examples:"0" => true" 0.1 " => true"abc" => false"1 a" => false"2e10" => true Note: It is intended for 阅读全文
摘要：
题目： Given a non-negative integer represented as a non-empty array of digits, plus one to the integer. You may assume the integer do not contain any le 阅读全文
摘要：
题目： Given an array of words and a length L, format the text such that each line has exactly L characters and is fully (left and right) justified. You 阅读全文