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题目： Implement int sqrt(int x). Compute and return the square root of x. 链接： http://leetcode.com/problems/sqrtx/ 题解： 求平方根。 二分法， Time Complexity - O(log 阅读全文
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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
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题目： Given two binary strings, return their sum (also a binary string). For example,a = "11"b = "1"Return "100". 链接： http://leetcode.com/problems/add-b 阅读全文
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题目： Given a non-negative number represented as an array of digits, plus one to the number. The digits are stored such that the most significant digit 阅读全文