anguiao

type Nullable<T> = T | null

class TreeNode {
  val: number
  left: Nullable<TreeNode>
  right: Nullable<TreeNode>
  constructor (val?: number, left?: Nullable<TreeNode>, right?: Nullable<TreeNode>) {
    this.val = val || 0
    this.left = left || null
    this.right = right || null

anguiao

FROM alpine:3.9

ENV TZ=Asia/Shanghai

ENV NGINX_VERSION 1.15.8

RUN NGINX_GPG_KEYS=B0F4253373F8F6F510D42178520A9993A1C052F8 \
	&& CONFIG="\
		--prefix=/etc/nginx \
		--sbin-path=/usr/sbin/nginx \