4TH ． 2019

Date
13th May, 2019 (Monday)
Time
13:00 - 17:00 (Reporting time: 12:00)
Venue
La Salle College
18 La Salle Road, Kowloon

Results

Champion: Pui Ching Middle School / Yuen Lok Kan / Wai Ka Hei / Yeung Man Tsung

Gold

  • Diocesan Boys' School / Leung Harris / Leung Ching Yue / Lin Yuet Ming
  • Sing Yin Secondary School / Choi Chun Ming / Chan King Kai / Liu Man Kai
  • La Salle College / Yeh King Fai / Lee Ching Hei / Lee Cheuk Kit

Silver (6 tasks or above)

  • Christian Alliance SC Chan Memorial College / Yeung Sin Hang Jason / Chan Kin Yeung
  • Hou Kong Middle School / Kou Wai Seng / Un Hou Hin / Wong Hok Fong
  • South Tuen Mun Government Secondary School / Lee Chun Kit / Tsang Chak Lam
  • The Workers' Children High School, Macau / Ho Kai Seng / Hong Fan Meng / U Man Cheok

Bronze (5 tasks or above)

  • Wah Yan College, Kowloon / Leung Ho Yin / Lee Shing Him / Leung Ka Chai
  • Ying Wa Girls' School / Cheng Tsz Ying / Lee Cho Man / Ho Ka Shuen
  • Tseung Kwan O Government Secondary School / Chow King Wang / Chun Yu Lam
  • Saint Paul School​​, Macau / Chung Tsz Lung / Lei Kai Chon / Tam Ka Kit
  • STFA Leung Kau Kui College / Chau Kin Yi / Ho Ngai Chi / Lee Yat Him
  • Yan Oi Tong Tin Ka Ping Secondary School / Ho Chun Fai / Ho Ka Yui / Wong Wai Chun

Distinction (6 tasks or above)

  • Pui Ching Middle School / Ng Yau Fu / Chung Wai Jit / Cheng Hei Chit
  • La Salle College / Xie Lingrui / Kwok Long Fung / Lam Hok Ching
  • Sing Yin Secondary School / Wong Tsz Fung / Tseng Wai Yin / Kong Marcus
  • Diocesan Boys' School / Tong Chun Shing / Shum Hei Chai / Lee Po Wa
  • Pui Ching Middle School / Wong Chun Hei / Wong Tsz Him / Zhen Zihao
  • Pui Ching Middle School / Lee Tak Him / Leung Ho Ning / Suen Marco Lok Hang
  • The Workers' Children High School, Macau / Mou U Neng / Ian Cheng U / Cheong Chan Ieong
  • Diocesan Boys' School / Chan Yuen Ho / Wong Yuen Ho / Tang Pok Man
  • Pui Ching Middle School / Chang Sum Wing / Poon Yat long / Wong Ho Nam
  • Sing Yin Secondary School / Lui Ka Kit / Bow Tsz Hin / Leung Yuk Shing
  • Diocesan Boys' School / Ng Tsz Hin / Lam Myron
  • Sing Yin Secondary School / Tse Ki Tung / Chau Lai Yin / Wong Tsz Hin

Merit (5 tasks or above)

  • Diocesan Boys' School / Chan Chun Ngai / Chow Pak Yin / Choy Kin Chung
  • Sing Yin Secondary School / Kwong King Lam / Kwan Ho Chi / Kwan Cheuk Yin
  • La Salle College / Kwok Man Ho / Wu Lok Hei / Tsoi Yi Hang
  • Ying Wa Girls' School / Au Sui Yu / Lee Ching Laam / Ng Sin Ting
  • Diocesan Boys' School / Zhou Tin Jik Chris / Chow Shing Chi / Lau Chun Sang
  • Pui Ching Middle School / Chung Sin Fai / Yiu Tsz Lam
  • Diocesan Boys' School / Lam Wai Chung / Chan Yiu Sang / Cheng Nick Hang
  • La Salle College / Jason To Sing Him / To Ka Hin / Chau Chun Hei
  • Pui Ching Middle School / Lo Shun Hang / Ho Yin Tsung / Leung Ka Long

Tasks

Solution

Photos

Rank Team (hover to see names) AC Pen A
38 / 49 / 181 		B
5 / 7 / 12 		C
2 / 6 / 19 		D
8 / 10 / 25 		E
4 / 5 / 10 		F
3 / 7 / 22 		G
43 / 50 / 137 		H
50 / 52 / 88 		I
19 / 25 / 49 		J
35 / 49 / 146 		K
45 / 49 / 103 		L
17 / 25 / 58
1 (G) 24 Complex 12 1118 23 0:23 147 2:27 280 3:00 / -5 111 1:51 139 1:59 / -1 248 3:08 / -3 7 0:07 24 0:04 / -1 41 0:41 68 0:48 / -1 11 0:11 19 0:19
2 (G) 12 We Come and Eat 11 602 21 0:21 173 2:33 / -1 -4 71 1:11 115 1:55 77 0:57 / -1 14 0:14 9 0:09 37 0:37 62 1:02 16 0:16 7 0:07
3 (G) 22 天気がいいから、散歩しましょう。 11 748 32 0:32 147 2:27 196 2:56 / -1 96 1:16 / -1 106 1:46 18 0:18 11 0:11 16 0:16 58 0:58 26 0:26 42 0:42
4 (G) 14 AC需要幾碼路，誰能預算？ 11 1001 82 1:02 / -1 187 3:07 214 2:14 / -4 153 2:33 122 1:42 / -1 -5 16 0:16 8 0:08 58 0:58 105 1:25 / -1 23 0:23 33 0:33
5 (D) 81 Chance is Leave to Hv Chance's Ppl 9 567 17 0:17 102 1:42 117 1:57 48 0:28 / -1 51 0:31 / -1 74 1:14 85 1:05 / -1 27 0:07 / -1 46 0:46
6 (D) 51 WA得極可恥 TLE無新意 那一線眼淚欠大志 8 698 103 1:23 / -1 -3 230 3:30 / -1 38 0:18 / -1 8 0:08 122 2:02 63 0:43 / -1 31 0:31 103 1:43
7 (D) 76 Edge People 8 829 61 1:01 347 3:27 / -7 39 0:39 12 0:12 153 2:33 68 1:08 66 0:46 / -1 83 1:23
8 (D) 85 Ivan is Late 7 502 14 0:14 91 1:31 -1 36 0:36 8 0:08 123 2:03 187 2:47 / -1 43 0:43 -4
9 (D) 62 お可愛いこと 7 571 91 1:11 / -1 14 0:14 9 0:09 129 1:29 / -2 91 1:31 38 0:38 199 2:39 / -2
10 (D) 55 玖二共識 7 631 33 0:33 25 0:25 15 0:15 191 2:51 / -1 165 2:05 / -2 100 1:00 / -2 102 1:42
11 (D) 82 Unlimit TLE 7 648 122 1:02 / -3 10 0:10 18 0:18 176 2:56 126 1:46 / -1 50 0:30 / -1 146 2:26
12 (D) 73 I Go to School by Bus 7 809 43 0:43 95 0:55 / -2 20 0:20 164 2:44 158 1:58 / -2 37 0:37 292 3:12 / -5
13 (D) 43 int main(){} 7 854 57 0:57 90 1:30 39 0:39 160 2:20 / -1 251 2:51 / -4 43 0:43 214 3:34
14 (D) 42 當(1) c出<<(字符)7; 7 955 196 1:56 / -4 101 1:21 / -1 86 0:26 / -3 148 2:28 28 0:28 90 0:50 / -2 306 3:26 / -5
15 (S) 15 SCC 6 377 50 0:30 / -1 -5 79 0:39 / -2 45 0:45 64 1:04 52 0:52 87 1:27
16 (D) 65 雷神 6 587 112 0:52 / -3 25 0:25 10 0:10 319 3:59 / -4 99 1:19 / -1 22 0:22
17 (S) 17 Hou Kong Middle School 6 681 149 1:49 / -2 -3 57 0:37 / -1 20 0:20 -3 135 1:55 / -1 156 1:36 / -3 164 2:44
18 (S) 26 Amanita Arocheae 6 851 220 2:00 / -5 107 1:27 / -1 38 0:38 239 3:59 180 2:40 / -1 67 1:07
19 (D) 61 perfect segment tree blossom 6 919 166 1:26 / -4 89 0:49 / -2 14 0:14 236 3:56 390 3:30 / -9 24 0:24 -5
20 (S) 11 Wrong Answer Forever 6 969 389 2:49 / -11 57 0:57 13 0:13 -5 112 1:52 45 0:45 353 3:53 / -6
21 (M) 44 Free Rider 5 370 64 0:44 / -1 83 1:23 17 0:17 139 1:59 / -1 67 1:07
22 (M) 84 fing fing fing 5 384 135 1:35 / -2 42 0:42 11 0:11 -1 159 2:19 / -1 37 0:37 -2
23 (M) 72 LCK Come and Eat 關我咩事 5 417 60 0:20 / -2 -1 117 1:17 / -2 31 0:31 118 1:38 / -1 91 1:11 / -1 -1
24 (M) 41 running bees 5 474 147 2:07 / -1 52 0:52 26 0:26 147 2:27 102 1:42
25 (B) 27 while(1) cout<<"WYKGG"; 5 479 205 2:05 / -4 -2 35 0:35 18 0:18 147 2:07 / -1 74 1:14
26 (B) 29 error404 brain not found 5 515 143 1:43 / -2 -2 54 0:54 48 0:28 / -1 -5 190 2:30 / -2 80 1:20
27 (B) 28 Forever Run Time Error 5 525 262 3:22 / -3 32 0:32 20 0:20 161 2:41 -2 50 0:50
28 (M) 31 Thanos Car 5 551 228 2:08 / -5 20 0:20 72 1:12 188 2:28 / -2 43 0:43 -3
29 (M) 45 志在參與 5 553 214 1:54 / -5 45 0:45 22 0:22 218 2:58 / -2 54 0:54
30 (M) 52 Jon is Absent 5 560 130 2:10 141 1:41 / -2 8 0:08 165 2:25 / -1 116 1:56 -2
31 (B) 18 Saint Paul School​​ 5 632 219 2:39 / -3 108 1:28 / -1 71 0:31 / -2 133 1:53 / -1 101 1:21 / -1
32 (M) 33 一個鐘肆拾貮 5 760 359 2:59 / -9 -4 120 1:20 / -2 56 0:36 / -1 195 2:15 / -3 30 0:30
33 (B) 23 你有咩問題？ 🤡 5 792 256 2:16 / -6 102 1:02 / -2 21 0:21 235 2:55 / -3 178 1:38 / -4 -5
34 (M) 74 IQ3 5 793 140 1:20 / -3 53 0:33 / -1 127 0:47 / -4 376 3:36 / -8 97 1:17 / -1
35 (B) 13 山區名校三劍客 5 884 148 2:28 -6 218 2:58 / -2 57 0:57 -6 332 3:52 / -5 129 2:09 -1
36 (-) 25 Lam Woo 4 487 234 2:34 / -4 -1 72 1:12 80 1:00 / -1 -12 101 1:41
37 (-) 34 YWGS3 4 563 47 0:27 / -1 303 3:03 / -6 58 0:58 -7 155 1:55 / -2
38 (-) 75 是但啦諗唔到 3 370 -18 274 2:14 / -7 14 0:14 -2 82 0:42 / -2
39 (-) 53 我冇問題 3 461 -1 -7 12 0:12 -2 300 3:00 / -6 149 1:49 / -2
40 (-) 66 d/dx (JM) = cstdio 3 461 -1 290 2:50 / -6 14 0:14 -5 157 1:37 / -3
41 (-) 32 CodingCLUB #1 3 831 -1 245 3:45 / -1 166 1:06 / -5 -1 420 3:40 / -10
42 (-) 83 YWGS4 2 90 -1 63 1:03 27 0:27 -1 -5
43 (-) 20 supernova 2 141 -8 -7 34 0:34 -1 107 1:27 / -1
44 (-) 64 你我一個人，出去 2 190 -12 166 1:46 / -3 24 0:24 -2 -3
45 (-) 35 MYYXWWY 2 289 -6 -5 58 0:58 -4 231 3:11 / -2
46 (-) 56 為何不是為了什麼而為所欲為 2 304 252 3:12 / -3 -6 52 0:52
47 (-) 16 Not too complicated 2 400 -2 -6 98 1:38 -1 302 3:22 / -5
48 (-) 63 CCCHWC Group 2 2 407 -1 223 3:43 184 2:24 / -2 -1 -3
49 (-) 21 CCCHWC Group 1 1 55 -2 -2 55 0:55 -2 -3
-- 19 PCmoi 0 0 -12
-- 54 CodingCLUB #2 0 0 -15 -5 -7

Latest News

  • List of participating schools (Updated on 8th May):
    SchoolOfficialSub-team# Students
    CCC Heep Woh College116
    Christian Alliance SC Chan Memorial College102
    Diocesan Boys' School1620
    Ho Lap College103
    Hong Kong Chinese Women's Club College114
    Hou Kong Middle School103
    La Salle College1518
    Pui Ching Middle School1620
    Pui Ching Middle School Macao129
    SaintPaul School​​, Macau103
    Sing Yin Secondary School1415
    SKH Lam Woo Memorial Secondary School103
    South Tuen Mun Government Secondary School102
    STFA Leung Kau Kui College116
    Wah Yan College, Kowloon103
    The Workers' Children High School, Macau116
    Tseung Kwan O Government Secondary School102
    Yan Oi Tong Tin Ka Ping Secondary School129
    Ying Wa Girls' School1415
    Total1933149
  • Website for the 4th La Salle — Pui Ching Programming Challenge is now online.
  • You may find some sample tasks HERE.
  • Codeforces Gym: 3rd (2018), 2nd (2017), 1st (2016)

Rules

  • This is a team contest for secondary school students. Each team shall consist of 2 to 3 students from the same school. Each school can send at most two 2-person teams.
  • Each school can nominate 1 official team and unlimited number of sub teams.
  • There will be 10 to 12 tasks, with no subtasks. Teams shall solve as most tasks as possible in 4 hours.
  • Members within a team may communicate with each other, but not with other teams.
  • Each team may only use 1 laptop. Teams must bring their own laptop. There will be no backup laptops.
  • Teams may bring and use unlimited amount of non-electronic reference books and notes.
  • Teams must not use any previously written code. Teams may only use basic document processing and software development software.
  • The allowed programming languages are Pascal, C, and C++11.
  • A verdict, either Accepted, Wrong Answer, Time Limit Exceeded, Runtime Error, or Compilation Error, will be given to each submission. Teams will not receive detailed results of each test.
  • Wrong Answer, Time Limit Exceeded, Runtime Error are regarded as Rejected.
  • The ranking will be made available to the teams, except during the last hour.
  • Each team may print not more than 30 pages of PDF documents.

Ranking and Awards

  • Teams are ordered by number of solved tasks, followed by the Penalty Time.
  • Calculation of Penalty Time
    • No Penalty Time for Unsolved tasks
    • The Penalty for a solved task is the number of minutes past the beginning of the contest that it is solved, plus the number of Rejected submissions multipled by 20 minutes.
    • The total penalty time is the sum of the Penalty Times of each task.
  • The 1st place official team will win the La Salle — Pui Ching Programming Challenge Cup.
  • The 1st - 4th place teams will win the Gold award.
  • The remaining official teams that solves a certain number of tasks (TBA) will win the Silver award.
  • The remaining official teams that solves a certain number of tasks (TBA) will win the Bronze award.
  • The sub teams that solves a certain number of tasks (TBA; same as Silver) will win the Distinction award.
  • The remaining sub teams that solves a certain number of tasks (TBA; same as Bronze) will win the Merit award.

Apply

  • Closed

Other Notes

  • All contestants must wear proper school uniform. Team uniform, PE uniform, house tee, class tee etc are also acceptable but it must be consistent within a team.
  • Tasks will only be available in English.
  • There will be tasks of various difficulty in no particular order.
  • Laptop requirements: 802.11a/b/g/n/ac to connect to the contest network. Charger cable of at least 2.5 meters.
  • Peripheral keyboard and mouse are allowed. External displays are not allowed.
  • Teachers may spectate inside the venue.
  • The organiser will arrange photo-taking and video recording for promotional purposes.
  • Enquiries: <>

Previous contests: 3rd (2018) 2nd (2017) 1st (2016)