更新
This commit is contained in:
28
Python-100-Days/Day01-15/Day05/perfect.py
Normal file
28
Python-100-Days/Day01-15/Day05/perfect.py
Normal file
@@ -0,0 +1,28 @@
|
||||
"""
|
||||
|
||||
找出1~9999之间的所有完美数
|
||||
完美数是除自身外其他所有因子的和正好等于这个数本身的数
|
||||
例如: 6 = 1 + 2 + 3, 28 = 1 + 2 + 4 + 7 + 14
|
||||
|
||||
Version: 0.1
|
||||
Author: 骆昊
|
||||
Date: 2018-03-02
|
||||
|
||||
"""
|
||||
import time
|
||||
import math
|
||||
|
||||
start = time.clock()
|
||||
for num in range(1, 10000):
|
||||
sum = 0
|
||||
for factor in range(1, int(math.sqrt(num)) + 1):
|
||||
if num % factor == 0:
|
||||
sum += factor
|
||||
if factor > 1 and num / factor != factor:
|
||||
sum += num / factor
|
||||
if sum == num:
|
||||
print(num)
|
||||
end = time.clock()
|
||||
print("执行时间:", (end - start), "秒")
|
||||
|
||||
# 通过比较上面两种不同的解决方案的执行时间 意识到优化程序的重要性
|
||||
Reference in New Issue
Block a user