Home
Problem Set
Training
Contest
Homework
Discussion
Record
Ranking
Login
Language
English
한국어
简体中文
正體中文
0 solutions
黑匣子
View Problem
Login to Submit
Discussions
Solutions
Files
Statistics
Information
ID
761
Time
500ms
Memory
500MiB
Difficulty
5
Tags
线段树
平衡树
堆
NOI 导刊
O2优化
# Submissions
2
Accepted
2
Uploaded By
Hydro
CLOSE
SIGN IN
Using your HFOJ universal account
Username
Password
Remember me
Forgot password or username?