James Pan

原题网址：https://leetcode.com/problems/fraction-to-recurring-decimal/ Given two integers representing the numerator and denominator of a fraction, return the fraction in string format. If the frac

原题网址：https://leetcode.com/problems/integer-to-roman/ Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. 方法：理解罗马数字的规律。二分法。 public clas