leetcode1370之上升下降字符串

 1 def sortString(str):
 2     """
 3 
 4     :param str:
 5     :return:
 6     """
 7     temp_arr = [[] for i in range(26)]
 8 
 9     for i in str:
10         temp_arr[ord(i) - 97].append(i)
11     print("temp-arr=", temp_arr)
12 
13     result = ‘‘
14     for r in temp_arr:
15         while r:
16             # 找最小排序
17             for i in temp_arr:
18                 if i:
19                     result += i[0]
20                     i.remove(i[0])
21                 else:
22                     continue
23             # 找最大排序
24             for j in reversed(temp_arr):
25                 if j:
26                     result += j[0]
27                     j.remove(j[0])
28                 else:
29                     continue
30 
31     return result
32 
33 
34 print(‘------------测试sortString()-------------‘)
35 str = "asdbsascs"
36 result = sortString(str)
37 print("result=", result)