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

Zero1將會遷移到全新的基於Hydro的OJ

Announcement

zero1 -> hydro (2026-02-10 23:00)

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

b601. 大水題
a031. 山六九之旅
a113. 字符串循環左移
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

Top Coder
1361145-3@g.... (S4A29陳偉祺)	836/85%
1360467-8@g.... ( )	828/84%
1554101-0@g.... (S2B27黃宇彬)	746/76%
1453222-0@g.... (S3B08余汶憲)	739/75%
1454530-6@g.... (S3A14區叡恆)	730/74%
1454884-4@g.... (S3A06吳雨慧)	726/74%
1164114-2@g.... (S6B32戴卓妍)	710/72%
1452945-9@g.... (S3F39羅振軒)	697/71%
1450840-0@g.... (S3B11李子舜)	696/71%
1365536-1@g.... (S4B39謝淵楨)	641/65%
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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)	55
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
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