算法的100天挑战 Algorithm for each day must be saved using the following form Day-1-"Name of Algorithm" Day-1 https://www.codewars.com/kata/580dda86c40fa6c45f00028a/train/java https://www.codewars.com/kata/59590976838112bfea0000fa/train/java [Swift] https://www.codewars.com/kata/546e2562b03326a88e000020/train/java 第二天