题目如下:
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有了497的解题基础,这道题还是比较好解,使用bisect.bisect_left()来通过权重对元素进行定位。参考代码如下:
'''
@auther: Jedi.L
@Date: Wed, Feb 27, 2019 11:54
@Email: xiangyangan@gmail.com
@Blog: www.tundrazone.com
'''
import random
import bisect
class Solution:
def __init__(self, w: List[int]):
self.w = w
self.sw = []
w_sum = 0
for ww in self.w:
w_sum += ww
self.sw.append(w_sum)
def pickIndex(self) -> int:
return bisect.bisect_left(
self.sw, random.randint(1, self.sw[-1]))
源码地址:
https://github.com/jediL/LeetCodeByPython
其它题目:[leetcode题目答案讲解汇总(Python版 持续更新)]
(https://www.jianshu.com/p/60b5241ca28e)
ps:如果您有好的建议,欢迎交流 :-D,
也欢迎访问我的个人博客 苔原带 (www.tundrazone.com)
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