Golang | Leetcode Golang题解之第382题链表随机节点
题目:
题解:
type Solution struct {
head *ListNode
}
func Constructor(head *ListNode) Solution {
return Solution{head}
}
func (s *Solution) GetRandom() (ans int) {
for node, i := s.head, 1; node != nil; node = node.Next {
if rand.Intn(i) == 0 { // 1/i 的概率选中(替换为答案)
ans = node.Val
}
i++
}
return
}