Golang | Leetcode Golang题解之第398题随机数索引

题目：

题解：

type Solution []intfunc Constructor(nums []int) Solution {return nums
}func (nums Solution) Pick(target int) (ans int) {cnt := 0for i, num := range nums {if num == target {cnt++ // 第 cnt 次遇到 targetif rand.Intn(cnt) == 0 {ans = i}}}return
}