标签:pos app xpl etc fun tco nts null 权重
Given an array w
of positive integers, where w[i]
describes the weight of index i
, write a function pickIndex
which randomly picks an index in proportion to its weight.
Note:
1 <= w.length <= 10000
1 <= w[i] <= 10^5
pickIndex
will be called at most 10000
times.Example 1:
Input:
["Solution","pickIndex"]
[[[1]],[]]
Output: [null,0]
Example 2:
Input:
["Solution","pickIndex","pickIndex","pickIndex","pickIndex","pickIndex"]
[[[1,3]],[],[],[],[],[]]
Output: [null,0,1,1,1,0]
Explanation of Input Syntax:
The input is two lists: the subroutines called and their arguments. Solution
‘s constructor has one argument, the array w
. pickIndex
has no arguments. Arguments are always wrapped with a list, even if there aren‘t any.
s
[LeetCode] Random Pick with Weight 根据权重随机取点
标签:pos app xpl etc fun tco nts null 权重
原文地址:https://www.cnblogs.com/grandyang/p/9784690.html