Contest Name Start Time End Time Duration (Mins)
Contest Name Start Time End Time Duration (Mins)
Contest Name Start Time End Time Duration (Mins)
RI November Course 2022 Day 2 (Contest) 10 Nov 2022 14:20 10 Nov 2022 15:50 90
EGOI Training '22 Contest 5 08 Oct 2022 08:00 10 Oct 2022 08:00 300
EGOI Training '22 Contest 3 24 Sep 2022 08:00 26 Sep 2022 08:00 300
EGOI Training '22 Contest 2 17 Sep 2022 08:00 19 Sep 2022 08:00 300
EGOI Training '22 Contest 1 10 Sep 2022 08:00 12 Sep 2022 08:00 300
IOI Training '22 Random Contest 7.1 04 Aug 2022 20:00 05 Aug 2022 01:00 300
IOI Training '22 Random Contest 7 04 Aug 2022 13:00 04 Aug 2022 18:00 300
IOI Training '22 Random Contest 6 01 Aug 2022 13:00 01 Aug 2022 18:00 300
HCI EC³ Final Contest 29 Jul 2022 14:30 29 Jul 2022 17:30 180
IOI Training '22 Random Contest 5 27 Jul 2022 13:00 27 Jul 2022 18:00 300
IOI Training '22 Random Contest 4 25 Jul 2022 13:00 25 Jul 2022 18:00 300
IOI Training '22 Random Contest 3 23 Jul 2022 13:00 23 Jul 2022 18:15 315
IOI Training '22 Random Contest 2 20 Jul 2022 13:00 20 Jul 2022 18:00 300
IOI Training '22 Random Contest 1 18 Jul 2022 13:00 18 Jul 2022 18:00 300
IOI Training '22 Contest 15 13 Jul 2022 13:20 13 Jul 2022 18:20 300
IOI Training '22 Contest 13 06 Jul 2022 13:10 06 Jul 2022 18:10 300
IOI Training '22 Contest 12 04 Jul 2022 12:45 04 Jul 2022 17:45 300
IOI Training '22 Contest 11 02 Jul 2022 13:00 02 Jul 2022 18:00 300
IOI Training '22 Contest 10 29 Jun 2022 12:45 29 Jun 2022 17:45 300
IOI Training '22 Contest 9 27 Jun 2022 13:00 27 Jun 2022 18:00 300
IOI Training '22 Contest 8 25 Jun 2022 13:00 25 Jun 2022 18:00 300
IOI Training '22 Contest 7 22 Jun 2022 13:15 22 Jun 2022 18:15 300
IOI Training '22 Contest 6 18 Jun 2022 13:00 18 Jun 2022 18:00 300
IOI Training '22 Contest 5 13 Jun 2022 12:30 13 Jun 2022 17:30 300
IOI Training '22 Contest 4 10 Jun 2022 12:30 10 Jun 2022 17:30 300
IOI Training '22 Contest 3 08 Jun 2022 13:00 08 Jun 2022 18:00 None
IOI Training '22 Contest 2 06 Jun 2022 13:00 06 Jun 2022 18:00 None
IOI Training '22 Contest 1 04 Jun 2022 14:00 04 Jun 2022 18:00 None
Educational Round 11 23 Apr 2022 00:00 07 May 2022 23:59 None
April Fools' 2022 01 Apr 2022 15:00 03 Apr 2022 23:59 None
Valentine's Day Contest 2022 14 Feb 2022 00:00 06 Mar 2022 23:59 None
Educational Round 10 (Goodbye cstuart and kai824) 02 Jan 2022 00:30 12 Jan 2022 23:59 None
Hello 2022 01 Jan 2022 00:00 07 Jan 2022 23:59 None
Dec Course 2021 Elementary Final Contest 29 Dec 2021 13:00 29 Dec 2021 18:00 300
Dec Course 2021 BAPS 29 Dec 2021 13:00 29 Dec 2021 18:00 300
Dec Course 2021 Intermediate Contest 9 (Dynamic Programming IV) 27 Dec 2021 10:00 27 Dec 2021 13:00 180
Dec Course 2021 Elementary Contest 10 (Graph Theory Basics) 27 Dec 2021 10:00 27 Dec 2021 12:00 120
Contest Mode Testing B 23 Dec 2021 13:00 23 Dec 2021 18:00 300
Dec Course 2021 Intermediate Contest 8 (Trees II) 22 Dec 2021 10:00 22 Dec 2021 13:00 180
Dec Course 2021 Elementary Contest 9 (DP II) 22 Dec 2021 10:00 22 Dec 2021 12:00 120
Dec Course 2021 Intermediate Contest 7 (Dynamic Programming III) 20 Dec 2021 10:00 20 Dec 2021 13:00 180
Dec Course 2021 Elementary Contest 8 (DP I) 20 Dec 2021 10:00 20 Dec 2021 12:00 120
Dec Course 2021 Intermediate Contest 6 (Trees I) 18 Dec 2021 10:00 18 Dec 2021 13:00 180
Dec Course 2021 Elementary Contest 7 (DS II) 18 Dec 2021 10:00 18 Dec 2021 12:00 120
Dec Course 2021 Intermediate Contest 5 (Dynamic Programming II) 15 Dec 2021 10:00 15 Dec 2021 13:00 180
Dec Course 2021 Elementary Contest 6 (Greedy) 15 Dec 2021 10:00 15 Dec 2021 12:00 120
Dec Course 2021 Intermediate Contest 4 (Data Structures III) 13 Dec 2021 10:00 13 Dec 2021 13:00 180
Dec Course 2021 Elementary Contest 5 (Complete Search & Binary Search) 13 Dec 2021 10:00 13 Dec 2021 12:00 120
Dec Course 2021 Intermediate Contest 3 (Greedy Algorithms) 11 Dec 2021 10:00 11 Dec 2021 13:00 180
Dec Course 2021 Elementary Contest 4 (DS I) 11 Dec 2021 10:00 11 Dec 2021 12:00 120
Dec Course 2021 Intermediate Contest 2 (Data Structures II) 08 Dec 2021 10:00 08 Dec 2021 13:00 180
Dec Course 2021 Elementary Contest 3 (STL Functions and Precomputation) 08 Dec 2021 10:00 08 Dec 2021 12:00 120
Testing Contest 2 06 Dec 2021 15:14 06 Dec 2021 15:25 None
Dec Course 2021 Intermediate Contest 1 (Classic Techniques) 06 Dec 2021 10:00 06 Dec 2021 13:00 180
Dec Course 2021 Diagnostic Test 01 Dec 2021 10:00 01 Dec 2021 13:00 180
Educational Round 9 (Goodbye 0rang3) 11 Nov 2021 12:00 30 Nov 2021 23:59 None
Educational Round 8 (Goodbye oolimry) 09 Oct 2021 00:00 31 Oct 2021 23:59 None
NJ SH Training Contest 2 (Greedy) 31 Oct 2021 13:00 31 Oct 2021 16:10 180
NJ SH Training Contest 1 (Shortest Path) 24 Oct 2021 13:00 24 Oct 2021 15:10 120
NUSH IOT II Test 2 2021 09 Oct 2021 14:20 11 Oct 2021 00:00 90
Educational Round 7 28 Aug 2021 00:00 12 Sep 2021 23:59 None
NUSH IOT II Test 1 2021 21 Aug 2021 14:20 23 Aug 2021 00:00 90
Educational Round 6B 08 Aug 2021 20:00 22 Aug 2021 20:00 None
Educational Round 6A 08 Aug 2021 20:00 22 Aug 2021 20:00 None
Educational Round 5 22 Jul 2021 00:00 30 Jul 2021 23:59 None
RI CSS Contest 1 14 Jul 2021 09:00 21 Jul 2021 09:00 None
Testing Subtasks 30 Jun 2021 00:00 01 Jul 2021 23:59 None
Educational Round 4 12 Jun 2021 00:00 26 Jun 2021 00:00 None
SGP Sparring 2021 18 Jun 2021 18:00 18 Jun 2021 23:31 300
Educational Round 3 22 Apr 2021 00:00 02 May 2021 23:59 None
April Fools 2021 (Dedicated to Jamez the Alien) 01 Apr 2021 00:00 07 Apr 2021 23:59 None
Valentines Contest 2021 (dedicated to Shiwei) 14 Feb 2021 00:00 21 Feb 2021 00:00 None
Hello 2021 01 Jan 2021 00:00 07 Jan 2021 23:59 None
Educational Round 2 (メリー クリスマス) 24 Dec 2020 16:00 31 Dec 2020 23:59 None
Dec Course 2020 BAPS 28 Dec 2020 12:30 28 Dec 2020 17:30 None
Dec Course 2020 Contest 11 (Trees 2) 26 Dec 2020 10:00 26 Dec 2020 13:00 None
Dec Course 2020 Contest 10 (Trees 1) 23 Dec 2020 10:00 23 Dec 2020 13:00 None
Dec Course 2020 Contest 9 (DP II) 21 Dec 2020 10:00 21 Dec 2020 13:00 None
Dec Course 2020 Contest 8 (Greedy) 19 Dec 2020 10:00 19 Dec 2020 13:00 None
Dec Course 2020 Contest 7 (Classic Techniques) 16 Dec 2020 10:00 16 Dec 2020 13:00 None
Dec Course 2020 Contest 6 (DS II) 14 Dec 2020 10:00 14 Dec 2020 13:00 None
Dec Course 2020 Contest 5 (DS I) 12 Dec 2020 10:00 12 Dec 2020 13:00 None
Dec Course 2020 Contest 4 (GT I) 09 Dec 2020 10:00 09 Dec 2020 13:00 None
Dec Course 2020 Contest 3 (DP I) 07 Dec 2020 10:00 07 Dec 2020 13:00 None
Educational Round 1 (Goodbye Benson) 30 Nov 2020 00:00 06 Dec 2020 23:59 None
Dec Course 2020 Contest 2 (STL & math) 05 Dec 2020 10:00 05 Dec 2020 13:00 None
Dec Course 2020 Contest 1 (Intro) 02 Dec 2020 10:00 02 Dec 2020 13:00 180
Contest Name Start Time End Time Duration (Mins)
APIO 2015 09 May 2015 13:00 None 300
APIO 2016 07 May 2016 12:00 None 300
APIO 2017 29 May 2017 13:00 None 300
APIO 2018 15 Oct 2021 14:24 None 300
APIO 2019 18 May 2019 00:00 None 300
APIO 2020 02 Apr 2021 00:00 None 300
APIO 2021 23 May 2021 00:00 None 300
APIO 2022 28 May 2022 13:00 None 300
ASEAN Sparring 2022 15 Jun 2022 14:00 None 300
Combined NOI Selection 2021 Round 1 17 Jan 2021 00:00 None 300
Combined NOI Selection 2021 Round 2 24 Jan 2021 00:00 None 300
December Course 2018 Advanced Final Contest 02 Feb 2022 00:00 None 300
December Course 2019 Advanced Final Contest 19 Sep 2021 10:14 None 300
HCI December Course Selection 2021 27 Nov 2021 13:00 None 300
HCI NOI Selection Retest 2020 01 Jan 2020 00:00 None 300
HCI NOI Selection Test 2017 15 Mar 2022 22:00 None 300
HCI-NUSH NOI Selection 2022 15 Jan 2022 13:00 None 300
HCI-RI 2020 May Contest 01 May 2020 00:00 None 180
IOI 2013 (Day 2) 01 Jan 2013 00:00 None 300
IOI 2018 (Day 1) 01 Jan 2018 00:00 None 300
IOI 2018 (Day 2) 01 Jan 2018 00:00 None 300
IOI 2019 (Day 1) 30 Jan 2022 00:00 None 300
IOI 2020 (Day 1) 01 Jan 2020 00:00 None 300
IOI 2020 (Day 2) 01 Jan 2020 00:00 None 300
IOI 2021 (Day 1) 23 Jun 2021 16:14 None 300
IOI 2021 (Day 2) 26 Jun 2021 09:50 None 300
IOI 2022 (Day 1) 05 Sep 2022 21:55 None 300
IOI 2022 (Day 2) 05 Sep 2022 21:58 None 300
NOI 2012 14 Oct 2021 00:59 None 300
NOI 2013 14 Oct 2021 00:37 None 300
NOI 2014 14 Oct 2021 00:13 None 300
NOI 2015 21 Jun 2021 13:15 None 300
NOI 2016 12 May 2021 11:37 None 300
NOI 2017 15 Nov 2020 23:00 None 300
NOI 2018 01 Apr 2021 00:00 None 300
NOI 2018 Preliminary Contest 13 Oct 2021 17:39 None 180
NOI 2019 01 Apr 2021 00:00 None 300
NOI 2019 Preliminary Contest 24 Sep 2021 14:09 None 240
NOI 2020 Finals 27 Mar 2021 00:00 None 300
NOI 2020 Preliminary Contest 28 Mar 2021 00:00 None 180
NOI 2020 Qualification Contest 15 Nov 2020 23:00 None 240
NOI 2021 Finals 15 Nov 2020 23:00 None 300
NOI 2021 Qualification Contest 20 Feb 2021 17:00 None 180
NOI 2022 Finals 19 Mar 2022 13:00 None 300
NOI 2022 Qualification Contest 19 Feb 2022 14:59 None 180
NUSH ISC 2018 01 Jan 2018 00:00 None 300
NUSH ISC 2020 21 Nov 2020 19:00 None 300
NUSH ISC 2021 13 Sep 2021 20:45 None 300
RI December Course Selection 2018 30 Nov 2018 00:00 None 300
RI December Course Selection Test 2021 22 Nov 2021 13:00 None 300
RI NOI Selection Test 2017 15 Mar 2022 13:00 None 300
RI November Course Stage 2 Selection Test 2019 08 Nov 2019 14:00 None 300
RI November Course Stage 2 Selection Test 2020 15 Nov 2020 16:21 None 300
RI November Course Stage 2 Selection Test 2021 05 Nov 2021 13:30 None 180
RI November Course Stage 2 Selection Test 2022 14 Nov 2022 13:00 None 300
RI-HCI December Course Selection 2019 19 Oct 2021 23:16 None 300
RI-HCI December Course Selection 2020 26 Nov 2020 00:00 None 300
RI-HCI Final Contest 2022 28 Nov 2022 13:10 None 300
RI-HCI NOI Selection Test 2018 14 Mar 2022 09:00 None 300
RI-HCI NOI Selection Test 2019 21 Oct 2021 23:21 None 300
RI-HCI NOI Selection Test 2020 28 Mar 2021 00:00 None 300
RI/RJC NOI Selection Test 2016 16 Mar 2022 19:00 None 300
RSA Fun Contest 15 Jun 2021 01:23 None 300
USACO 2021 February Contest, Platinum 01 Feb 2021 00:00 None 300
UWCOI 2020 31 Mar 2021 00:00 None 240
codebreaker 24 Nov 2022 22:22 None 300
Contest Name Start Time End Time Duration (Mins)
Dec Course 2022 Practice 2 (DS II) 03 Dec 2022 13:00 None None
Dec Course 2022 Practice 1 (Classic Techniques) 03 Dec 2022 09:00 None None
HCI NOI Training 2022 Practice 8 (Dynamic Programming 2) 25 Nov 2022 09:00 None None
HCI NOI Training 2022 Practice 7 (Dynamic Programming 1) 23 Nov 2022 09:00 None None
RI November Course 2022 Day 7 21 Nov 2022 08:00 None None
HCI NOI Training 2022 Practice 6 (Graph Theory 2) 21 Nov 2022 00:09 None None
RI November Course 2022 Day 6 18 Nov 2022 09:00 None None
HCI NOI Training 2022 Practice 5 (Graph Theory 1) 18 Nov 2022 09:00 None None
Dec Course 2022 Prereq (Graph Theory II) 17 Nov 2022 03:45 None None
Dec Course 2022 Prereq (Graph Theory I) 17 Nov 2022 03:45 None None
Dec Course 2022 Prereq (Dynamic Programming) 17 Nov 2022 03:45 None None
Dec Course 2022 Prereq (STL Data Structures) 17 Nov 2022 03:44 None None
Dec Course 2022 Prereq (Basics) 17 Nov 2022 03:44 None None
Dec Course 2022 Prereq (Introduction) 17 Nov 2022 03:36 None None
Dec Course 2022 Prereq (Essentials) 17 Nov 2022 03:30 None None
RI November Course 2022 Day 5 16 Nov 2022 09:00 None None
HCI NOI Training 2022 Practice 4 (Sliding Window, Greedy) 16 Nov 2022 09:23 None None
HCI NOI Training 2022 Practice 3 (DS 2, BSTA) 14 Nov 2022 00:09 None None
RI November Course 2022 Day 3 11 Nov 2022 11:00 None None
HCI NOI Training 2022 Practice 2 (Syntax, DS 1) 11 Nov 2022 09:00 None None
RI November Course 2022 Day 2 10 Nov 2022 09:00 None None
HCI NOI Training 2022 Practice 1 (Syntax) 09 Nov 2022 09:00 None None
RI November Course 2022 Day 1 08 Nov 2022 16:00 None None
Codebreaker Practice Contest 10 Jun 2022 19:02 None None
HCI IRSCP Group B Trees Practice 15 Mar 2022 20:33 None None
RI CSS Contest 2 19 Jan 2022 09:39 None None
RI CP Random Contest 12 Jan 2022 21:23 None None
RI CSS Contest 11 Jan 2022 08:55 None None
Analysis Mode Mirror 01 Jan 2022 00:00 None None
Dec Course 2021 Intermediate Practice 10 (Square Root Decomposition) 27 Dec 2021 14:00 None None
Dec Course 2021 Elementary Practice 11 (Subtasks & Complete Search) 27 Dec 2021 14:00 None None
Dec Course 2021 Intermediate Practice 9 (DP IV) 22 Dec 2021 14:00 None None
Dec Course 2021 Elementary Practice 10 (Graph Theory Basics) 22 Dec 2021 14:00 None None
Dec Course 2021 Intermediate Practice 8 (Trees II) 20 Dec 2021 14:00 None None
Dec Course 2021 Elementary Practice 9 (DP II) 20 Dec 2021 14:00 None None
Dec Course 2021 Elementary Practice 8 (DP I) 18 Dec 2021 14:00 None None
Dec Course 2021 Intermediate Practice 7 (DP III) 18 Dec 2021 14:00 None None
Dec Course 2021 Intermediate Practice 6 (Trees I) 15 Dec 2021 14:00 None None
Dec Course 2021 Elementary Practice 7 (DS II) 15 Dec 2021 14:00 None None
Dec Course 2021 Intermediate Practice 5 (DP II) 13 Dec 2021 14:00 None None
Dec Course 2021 Elementary Practice 6 (Greedy) 13 Dec 2021 14:00 None None
Dec Course 2021 Elementary Practice 5 (Complete Search & Binary Search) 11 Dec 2021 14:00 None None
Dec Course 2021 Intermediate Practice 4 (DS III) 08 Dec 2021 15:00 None None
Dec Course 2021 Intermediate Practice 3 (Greedy) 08 Dec 2021 14:00 None None
Dec Course 2021 Elementary Practice 4 (DS I) 08 Dec 2021 14:00 None None
Dec Course 2021 Intermediate Practice 2 (DS II) 06 Dec 2021 14:00 None None
Dec Course 2021 Elementary Practice 3 (STL + Precomputation) 06 Dec 2021 13:30 None None
Dec Course 2021 Intermediate Practice 1 (Classic Techniques) 04 Dec 2021 14:30 None None
Dec Course 2021 Elementary Practice 2 (Sorting and Algorithmic Thinking) 04 Dec 2021 13:30 None None
Dec Course 2021 Elementary Practice 1 (Syntax) 01 Dec 2021 14:00 None None
Dec Course 2021 Prereq (DP I) 01 Dec 2021 13:00 None None
Dec Course 2021 Prereq (Math) 01 Dec 2021 13:00 None None
Dec Course 2021 Prereq (STL) 01 Dec 2021 13:00 None None
Dec Course 2021 Prereq (GT) 01 Dec 2021 13:00 None None
HCI NOI Training 2021 Practice 8 (DS 3) 24 Nov 2021 09:00 None None
HCI NOI Training 2021 Practice 7 (DP II) 22 Nov 2021 09:06 None None
HCI NOI Training 2021 Practice 5 (DP 1) 17 Nov 2021 09:00 None None
HCI NOI Training 2021 Practice 6 (Graph Theory 2) 17 Nov 2021 09:00 None None
HCI NOI Training 2021 Adv Practice 4 (Tree Tricks) 15 Nov 2021 14:00 None None
HCI NOI Training 2021 Practice 4 (Graph Theory 1) 15 Nov 2021 09:00 None None
HCI NOI Training 2021 Practice 3 (DS & Algo 3) 13 Nov 2021 09:00 None None
RI November Training Practice 7 (Fenwick / Segment Trees + Applications) 12 Nov 2021 09:00 None None
RI November Training Practice 6 (Math) 10 Nov 2021 10:21 None None
RI November Training Practice 5 (Trees) 10 Nov 2021 09:00 None None
HCI NOI Training 2021 Practice 2 (DS & Algo 1) 10 Nov 2021 09:00 None None
HCI NOI Training 2021 Practice 1 (Syntax) 08 Nov 2021 09:00 None None
HCI NOI Training 2021 Adv Practice 1 (DS DP) 08 Nov 2021 09:00 None None
RI November Training Practice 4 (Graph Theory 1) 08 Nov 2021 09:00 None None
HCI NOI Training 2021 Adv Self Diagnostic 06 Nov 2021 00:23 None None
RI November Training Practice 3 (DP2) 05 Nov 2021 10:38 None None
RI November Training Practice 2B (DP) 03 Nov 2021 00:00 None None
RI November Training Practice 2A (Greedy & Binary Search) 02 Nov 2021 00:00 None None
RI November Training Practice 1 (Syntax & DS) 01 Nov 2021 10:10 None None
DNC Practice Problems 18 Oct 2021 20:49 None None
FFT Practice Problems 17 Oct 2021 15:17 None None
Treap Practice Problems 18 Jun 2021 16:55 None None
Convex Hull Speedup Practice Problems 18 Jun 2021 16:48 None None
Square Root Decomposition Practice Problems 18 Jun 2021 16:36 None None
Slope Trick Practice Problems 18 Jun 2021 16:32 None None
Dec Course 2020 Practice 11 (DP III) 26 Dec 2020 14:00 None None
Dec Course 2020 Practice 10 (Trees 2) 23 Dec 2020 14:00 None None
Dec Course 2020 Practice 9 (Trees 1) 21 Dec 2020 14:00 None None
Dec Course 2020 Practice 8 (DP II) 19 Dec 2020 14:00 None None
Dec Course 2020 Practice 7 (Greedy) 16 Dec 2020 14:00 None None
Dec Course 2020 Practice 6 (Classic Tech) 14 Dec 2020 14:00 None None
Dec Course 2020 Practice 5 (DS II) 09 Dec 2020 14:00 None None
Dec Course 2020 Practice 4 (DS I) 09 Dec 2020 14:00 None None
Dec Course 2020 Practice 3 (GT I) 07 Dec 2020 14:00 None None
Dec Course 2020 Practice 2 (DP I) 05 Dec 2020 14:00 None None
Dec Course 2020 Practice 1 (STL) 02 Dec 2020 14:30 None None
Starter Problems 28 Nov 2020 14:30 None None