Online Judge System

An Online Judge System For Begneers

AC: Accept.
NA: Not Accepted. Some test cases were not currect.
WA: Wrong Answer with the line number and current answer.
TLE: Time Limit Exceed.
MLE: Memory Limit Exceed.
OLE: Output Limit Exceed.
RE: Runtime Error e.q.: Out of range in Array.
RF: Restricted Function.
CE: Compile Error. The Compiler
SE: System Error, undefined Errors.

本系統目前支援的程式語言如下：

User's guide | 我要加題目

Zero1將會遷移到全新的，基於Hydro的OJ：https://oj.puiching.edu.mo

Zero1將會遷移到全新的，基於Hydro的OJ：https://oj.puiching.edu.mo

Announcement

Hydro OJ (2026-02-10 00:11)

PCOI 2025 第一季題目清單 (2025-10-22 20:28)

PCOI 2023 第二季題目 (2024-02-24 23:45)

Latest Problems

b640. 数字排序 -- CCF
b639. 十進制轉十六進制
b619. 三元組 (triples)
b618. 排序 (sort) [數據減弱版]
b617. 蠟燭 (candles)
b616. 洗牌 (shuffle)
b596. 計算 (calc)
b245. 十進制轉十六進制
a725. 数字排序 -- CCF
b598. 猜分數 (guess)
b372. [CSP-J 2024] 扑克牌
a382. 方陣系列 -- 順序方陣(2)

b120. 齊來解方程(二)
b599. 序列詢問 (query)
b597. 牛奶 (milk)
b593. 數列中尋找第二最大值
b594. 递增n元组
b517. 旅行計劃 (trip) -- 算C 測驗
b592. 數列中尋找最大值
b418. 鐵達尼克號遇險
a045. 尋找最大值
b585. 迷宫
b539. 递增三元组
b520. 淘汰賽 (knockout) -- 算C 測驗

Top Coder
1361145-3@g.... (S4A29陳偉祺)	835/85%
1360467-8@g.... ( )	829/84%
1554101-0@g.... (S2B27黃宇彬)	747/76%
1453222-0@g.... (S3B08余汶憲)	740/75%
1454530-6@g.... (S3A14區叡恆)	731/74%
1454884-4@g.... (S3A06吳雨慧)	727/74%
1164114-2@g.... (S6B32戴卓妍)	710/72%
1452945-9@g.... (S3F39羅振軒)	698/71%
1450840-0@g.... (S3B11李子舜)	697/71%
1365536-1@g.... (S4B39謝淵楨)	642/65%
	more...

Top Author
kichan@g.pui... (陳嘉賢CHAN KA IN)	297
ricky (電腦黃)	239
lamkinun@gma... (Kinda Lam)	87
admin (Judge)	59
zero (管理員)	56
kulam@g.puic... (林建源)	43
cwng@g.puich... (吳振華NG CHAN WA)	34
xllin@g.puic... (Emily Lin)	29
issin@g.puic... (冼一心老師)	25
1360174-1@g.... (S4A03何彥樂)	23

Top School
1: Pui Ching Middle School
2: Pui Ching Middle SchooI
more...