线程安全懒加载单例 - Problem Statistics - CodeFun2000

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	luti	1900ms	73.1 MiB	Java	1.1 KiB	2026-10-14 18:11:53

ID: 5456
Time: 1000ms
Memory: 256MiB
Difficulty: 5
Tags: (None)
# Submissions: 5
Accepted: 1
Uploaded By: TaZi