Contest Name Start Time End Time Duration (Mins)
Contest Name Start Time End Time Duration (Mins)
Contest Name Start Time End Time Duration (Mins)
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 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
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
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 2021 05 Nov 2021 13:30 None 180
RI November Selection 2020 15 Nov 2020 16:21 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 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
Contest Name Start Time End Time Duration (Mins)
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