-
Notifications
You must be signed in to change notification settings - Fork 2
/
bubble_sort.py
182 lines (170 loc) · 5.79 KB
/
bubble_sort.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
#!/usr/bin/env python
#-*- encoding: UTF-8-*-
"""
* Copyright © https://github.com/jarry All rights reserved.
* @author: [email protected]
* @version: 1.0
"""
import time
'''
# 冒泡排序升序,将最大的冒泡到最后
'''
def bubble_sort1(arr):
print('bubble_sort1 from left to right:')
length = len(arr)
for i in range(length):
for j in range(length - i - 1):
# 自左往右每两个进行比较,把大的交换到右侧
# 逐轮冒出最大数,已经排好序的不要再比较
if (arr[j] > arr[j + 1]):
[arr[j], arr[j + 1]] = [arr[j + 1], arr[j]]
print('i=' + str(i), 'j=' + str(j), arr)
'''
# 冒泡排序降序,将最小的冒泡到最后
'''
def bubble_sort2(arr):
print('bubble_sort2 from right to left:')
length = len(arr)
for i in range(length):
for j in range(length - 1, i, -1):
# 自右往左每两个进行比较,把小的交换到右侧
# 逐轮冒出最小数,已经排好序的不要再比较
if (arr[j - 1] < arr[j]):
[arr[j - 1], arr[j]] = [arr[j], arr[j - 1]]
print('i=' + str(i), 'j=' + str(j), arr)
'''
# 冒泡排序增加交换标志,针对有序情况优化
'''
def bubble_sort3(arr):
print('bubble_sort3 add flag:')
# 增加一个标志,如果某一轮没有进行过任何的交换
# 则说明当前数组已排好序,则不必继续后面的遍历,
length = len(arr)
flag = True
for i in range(length):
flag = False
print('no. ' + str(i))
for j in range(length -i - 1):
# 自左往右每两个进行比较,把大的交换到右侧
# 逐轮冒出最大数,已经排好序的不要再比较
if (arr[j] > arr[j + 1]):
flag = True
[arr[j], arr[j + 1]] = [arr[j + 1], arr[j]]
print('i=' + str(i), 'j=' + str(j), arr)
# test
arr1 = [ 7, 11, 9, 10, 12, 13, 8 ]
start_time = time.time()
bubble_sort1(arr1)
print(arr1)
print("time:" + str((time.time() - start_time) * 1000) + " ms")
arr2 = [ 7, 11, 9, 10, 12, 13, 8 ]
start_time = time.time()
bubble_sort2(arr2)
print(arr2)
print("time:" + str((time.time() - start_time) * 1000) + " ms")
arr3 = [ 7, 11, 9, 10, 12, 13, 8 ]
start_time = time.time()
bubble_sort3(arr3)
print(arr3)
print("time:" + str((time.time() - start_time) * 1000) + " ms")
"""
jarrys-MacBook-Pro:bubble_sort jarry$ python bubble_sort.py
bubble_sort add flag:
no. 0
('i=0', 'j=0', [7, 11, 9, 10, 12, 13, 8])
('i=0', 'j=1', [7, 9, 11, 10, 12, 13, 8])
('i=0', 'j=2', [7, 9, 10, 11, 12, 13, 8])
('i=0', 'j=3', [7, 9, 10, 11, 12, 13, 8])
('i=0', 'j=4', [7, 9, 10, 11, 12, 13, 8])
('i=0', 'j=5', [7, 9, 10, 11, 12, 8, 13])
no. 1
('i=1', 'j=0', [7, 9, 10, 11, 12, 8, 13])
('i=1', 'j=1', [7, 9, 10, 11, 12, 8, 13])
('i=1', 'j=2', [7, 9, 10, 11, 12, 8, 13])
('i=1', 'j=3', [7, 9, 10, 11, 12, 8, 13])
('i=1', 'j=4', [7, 9, 10, 11, 8, 12, 13])
('i=1', 'j=5', [7, 9, 10, 11, 8, 12, 13])
no. 2
('i=2', 'j=0', [7, 9, 10, 11, 8, 12, 13])
('i=2', 'j=1', [7, 9, 10, 11, 8, 12, 13])
('i=2', 'j=2', [7, 9, 10, 11, 8, 12, 13])
('i=2', 'j=3', [7, 9, 10, 8, 11, 12, 13])
('i=2', 'j=4', [7, 9, 10, 8, 11, 12, 13])
('i=2', 'j=5', [7, 9, 10, 8, 11, 12, 13])
no. 3
('i=3', 'j=0', [7, 9, 10, 8, 11, 12, 13])
('i=3', 'j=1', [7, 9, 10, 8, 11, 12, 13])
('i=3', 'j=2', [7, 9, 8, 10, 11, 12, 13])
('i=3', 'j=3', [7, 9, 8, 10, 11, 12, 13])
('i=3', 'j=4', [7, 9, 8, 10, 11, 12, 13])
('i=3', 'j=5', [7, 9, 8, 10, 11, 12, 13])
no. 4
('i=4', 'j=0', [7, 9, 8, 10, 11, 12, 13])
('i=4', 'j=1', [7, 8, 9, 10, 11, 12, 13])
('i=4', 'j=2', [7, 8, 9, 10, 11, 12, 13])
('i=4', 'j=3', [7, 8, 9, 10, 11, 12, 13])
('i=4', 'j=4', [7, 8, 9, 10, 11, 12, 13])
('i=4', 'j=5', [7, 8, 9, 10, 11, 12, 13])
no. 5
('i=5', 'j=0', [7, 8, 9, 10, 11, 12, 13])
('i=5', 'j=1', [7, 8, 9, 10, 11, 12, 13])
('i=5', 'j=2', [7, 8, 9, 10, 11, 12, 13])
('i=5', 'j=3', [7, 8, 9, 10, 11, 12, 13])
('i=5', 'j=4', [7, 8, 9, 10, 11, 12, 13])
('i=5', 'j=5', [7, 8, 9, 10, 11, 12, 13])
no. 6
('i=6', 'j=0', [7, 8, 9, 10, 11, 12, 13])
jarrys-MacBook-Pro:bubble_sort jarry$ python bubble_sort.py
bubble_sort add flag:
no. 0
('i=0', 'j=0', [7, 11, 9, 10, 12, 13, 8])
('i=0', 'j=1', [7, 9, 11, 10, 12, 13, 8])
('i=0', 'j=2', [7, 9, 10, 11, 12, 13, 8])
('i=0', 'j=3', [7, 9, 10, 11, 12, 13, 8])
('i=0', 'j=4', [7, 9, 10, 11, 12, 13, 8])
('i=0', 'j=5', [7, 9, 10, 11, 12, 8, 13])
no. 1
('i=1', 'j=0', [7, 9, 10, 11, 12, 8, 13])
('i=1', 'j=1', [7, 9, 10, 11, 12, 8, 13])
('i=1', 'j=2', [7, 9, 10, 11, 12, 8, 13])
('i=1', 'j=3', [7, 9, 10, 11, 12, 8, 13])
('i=1', 'j=4', [7, 9, 10, 11, 8, 12, 13])
('i=1', 'j=5', [7, 9, 10, 11, 8, 12, 13])
no. 2
('i=2', 'j=0', [7, 9, 10, 11, 8, 12, 13])
('i=2', 'j=1', [7, 9, 10, 11, 8, 12, 13])
('i=2', 'j=2', [7, 9, 10, 11, 8, 12, 13])
('i=2', 'j=3', [7, 9, 10, 8, 11, 12, 13])
('i=2', 'j=4', [7, 9, 10, 8, 11, 12, 13])
('i=2', 'j=5', [7, 9, 10, 8, 11, 12, 13])
no. 3
('i=3', 'j=0', [7, 9, 10, 8, 11, 12, 13])
('i=3', 'j=1', [7, 9, 10, 8, 11, 12, 13])
('i=3', 'j=2', [7, 9, 8, 10, 11, 12, 13])
('i=3', 'j=3', [7, 9, 8, 10, 11, 12, 13])
('i=3', 'j=4', [7, 9, 8, 10, 11, 12, 13])
('i=3', 'j=5', [7, 9, 8, 10, 11, 12, 13])
no. 4
('i=4', 'j=0', [7, 9, 8, 10, 11, 12, 13])
('i=4', 'j=1', [7, 8, 9, 10, 11, 12, 13])
('i=4', 'j=2', [7, 8, 9, 10, 11, 12, 13])
('i=4', 'j=3', [7, 8, 9, 10, 11, 12, 13])
('i=4', 'j=4', [7, 8, 9, 10, 11, 12, 13])
('i=4', 'j=5', [7, 8, 9, 10, 11, 12, 13])
no. 5
('i=5', 'j=0', [7, 8, 9, 10, 11, 12, 13])
('i=5', 'j=1', [7, 8, 9, 10, 11, 12, 13])
('i=5', 'j=2', [7, 8, 9, 10, 11, 12, 13])
('i=5', 'j=3', [7, 8, 9, 10, 11, 12, 13])
('i=5', 'j=4', [7, 8, 9, 10, 11, 12, 13])
('i=5', 'j=5', [7, 8, 9, 10, 11, 12, 13])
no. 6
('i=6', 'j=0', [7, 8, 9, 10, 11, 12, 13])
('i=6', 'j=1', [7, 8, 9, 10, 11, 12, 13])
('i=6', 'j=2', [7, 8, 9, 10, 11, 12, 13])
('i=6', 'j=3', [7, 8, 9, 10, 11, 12, 13])
('i=6', 'j=4', [7, 8, 9, 10, 11, 12, 13])
('i=6', 'j=5', [7, 8, 9, 10, 11, 12, 13])
[7, 8, 9, 10, 11, 12, 13]
time:0.400066375732 ms
"""