| Contest Name | Start Time | End Time | Duration (Mins) |
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| Contest Name | Start Time | End Time | Duration (Mins) |
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| Contest Name | Start Time | End Time | Duration (Mins) | April Fools 2024 | 01 Apr 2024 00:00 | 07 Apr 2024 23:59 | None | HCI (HS) 2024 Contest 1 | 14 Mar 2024 15:00 | 14 Mar 2024 18:00 | 180 | YTIC CP Diag | 16 Feb 2024 16:00 | 16 Feb 2024 17:00 | 60 | RICP Diagnostic Contest | 19 Jan 2024 13:35 | 19 Jan 2024 15:30 | 105 | Hello 2024 | 01 Jan 2024 00:00 | 07 Jan 2024 23:59 | None | December Course 2023 Advanced Final Contest | 30 Dec 2023 12:40 | 30 Dec 2023 17:40 | 300 | December Course 2023 Elementary Final Contest | 30 Dec 2023 12:30 | 30 Dec 2023 17:30 | 300 | Dec Course 2023 Elementary Contest 9 (DP II) | 27 Dec 2023 09:00 | 27 Dec 2023 12:00 | 180 | Dec Course 2023 Advanced Contest 9 (DP IV) | 27 Dec 2023 09:00 | 27 Dec 2023 12:00 | 180 | Dec Course 2023 Advanced Contest 8 (Trees III) | 23 Dec 2023 09:00 | 23 Dec 2023 12:00 | 180 | Dec Course 2023 Elementary Contest 8 (Recursion + DP I) | 23 Dec 2023 09:00 | 23 Dec 2023 12:00 | 180 | Dec Course 2023 Advanced Contest 7 (Trees II) | 20 Dec 2023 09:00 | 20 Dec 2023 12:00 | 180 | Dec Course 2023 Elementary Contest 7 (DS II) | 20 Dec 2023 09:00 | 20 Dec 2023 12:00 | 180 | Dec Course 2023 Advanced Contest 6 (DP III) | 18 Dec 2023 09:00 | 18 Dec 2023 12:00 | 180 | Dec Course 2023 Elementary Contest 6 (Greedy) | 18 Dec 2023 09:00 | 18 Dec 2023 12:00 | 180 | Dec Course 2023 Advanced Contest 5 (Trees I) | 16 Dec 2023 09:00 | 16 Dec 2023 12:00 | 180 | Dec Course 2023 Elementary Contest 5 (Complete Search, Binary Search) | 16 Dec 2023 09:00 | 16 Dec 2023 12:00 | 180 | Dec Course 2023 Advanced Contest 4 (DP II) | 13 Dec 2023 09:00 | 13 Dec 2023 12:00 | 180 | Dec Course 2023 Elementary Contest 4 (DS I) | 13 Dec 2023 09:00 | 13 Dec 2023 12:00 | 180 | Dec Course 2023 Advanced Contest 3 (DS III) | 11 Dec 2023 09:00 | 11 Dec 2023 12:00 | 180 | Dec Course 2023 Elementary Contest 3 (STL, Precomputation) | 11 Dec 2023 09:00 | 11 Dec 2023 12:00 | 180 | Dec Course 2023 Elementary Contest 2 (Big O Notation, Algorithmic Thinking, Sorting) | 09 Dec 2023 09:00 | 09 Dec 2023 12:00 | 180 | Dec Course 2023 Advanced Contest 2 (Greedy) | 09 Dec 2023 09:00 | 09 Dec 2023 12:00 | 180 | Dec Course 2023 Advanced Contest 1 (Classic Techniques and DS II) | 06 Dec 2023 09:00 | 06 Dec 2023 12:00 | 180 | Dec Course 2023 Elementary Contest 1 (Syntax) | 06 Dec 2023 09:00 | 06 Dec 2023 12:00 | 180 | Dec Course 2023 Selection Test | 02 Dec 2023 13:00 | 02 Dec 2023 18:00 | 300 | December Course Mock Selection Test 2023 | 11 Nov 2023 11:11 | 02 Dec 2023 09:00 | 300 | Testing | 23 Nov 2023 07:00 | 29 Nov 2023 08:00 | 1000 | HCI November Final Contest 2023 | 27 Nov 2023 13:14 | 27 Nov 2023 18:14 | 300 | RI Novcourse Final Contest 2023 | 20 Nov 2023 09:20 | 25 Nov 2023 23:59 | 180 | Novcourse 2023 Day 1 Contest | 08 Nov 2023 13:00 | 08 Nov 2023 16:00 | None | HCI NOI Training 2023 Advanced 1 | 08 Nov 2023 09:45 | 08 Nov 2023 12:30 | None | AOI 2023 Day 2 | 21 Aug 2023 15:50 | 21 Aug 2023 17:50 | 120 | AOI 2023 Day 1 | 14 Aug 2023 15:50 | 14 Aug 2023 17:50 | 120 | HCI EC³ Beginner Contest | 05 May 2023 14:30 | 05 May 2023 17:05 | 155 | April Fools 2023 | 04 Jan 2023 00:00 | 14 Apr 2023 23:59 | None | ANDSS Coding Head Selection Duel | 03 Apr 2023 16:15 | 03 Apr 2023 18:00 | 90 | Valentine's Day Contest 2023 | 14 Feb 2023 00:00 | 21 Feb 2023 23:59 | None | RI Grab Fest 2023 (Part B) | 17 Feb 2023 13:30 | 17 Feb 2023 16:30 | 60 | RI Grab Fest 2023 | 10 Feb 2023 13:30 | 10 Feb 2023 16:00 | 90 | ANDSS Welcome 2023 Day 2 | 27 Jan 2023 14:00 | 27 Jan 2023 18:00 | 240 | ANDSS Welcome 2023 Day 1 | 18 Jan 2023 16:20 | 18 Jan 2023 17:50 | 90 | Hello 2023 | 02 Jan 2023 19:45 | 02 Jan 2023 23:00 | None | Dec Course 2022 BAPS | 28 Dec 2022 12:00 | 28 Dec 2022 17:00 | 300 | Dec Course 2022 Contest 9e | 27 Dec 2022 09:00 | 27 Dec 2022 12:00 | None | Dec Course 2022 Contest 9 (DP IV) | 27 Dec 2022 09:00 | 27 Dec 2022 12:00 | None | Dec Course 2022 Contest 8 (Trees III) | 21 Dec 2022 09:00 | 21 Dec 2022 12:00 | 180 | Dec Course 2022 Contest 8e | 21 Dec 2022 09:00 | 21 Dec 2022 12:00 | None | Dec Course 2022 Contest 7 (Trees II) | 19 Dec 2022 09:05 | 19 Dec 2022 12:05 | None | Dec Course 2022 Contest 6 (DP III) | 17 Dec 2022 09:10 | 17 Dec 2022 12:10 | 180 | Dec Course 2022 Contest 5 (Trees I) | 14 Dec 2022 09:00 | 14 Dec 2022 12:00 | 180 | Dec Course 2022 Contest 4 (DP II) | 12 Dec 2022 09:00 | 12 Dec 2022 12:00 | 180 | Dec Course 2022 Contest 3 (DS III) | 10 Dec 2022 09:00 | 10 Dec 2022 12:00 | None | Dec Course 2022 Contest 2 (Greedy) | 07 Dec 2022 09:12 | 07 Dec 2022 12:12 | None | Dec Course 2022 Contest 1 (Classic Techniques + DS II) | 05 Dec 2022 09:00 | 05 Dec 2022 12:00 | None | 2022 December Course Diagnostic Test (30 Nov) | 30 Nov 2022 14:15 | 30 Nov 2022 17:50 | None | 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 |
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| 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 | APIO 2023 | 06 Jun 2023 18:33 | 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 | DDC 2023 Final Contest | 29 Dec 2023 12:40 | None | 300 | December Course 2018 Advanced Final Contest | 02 Feb 2022 00:00 | None | 300 | December Course 2018 Elementary Final Contest | 11 Jan 2023 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 | NOI 2023 Finals | 18 Mar 2023 21:00 | None | 300 | NOI 2023 Qualification Contest | 20 Feb 2023 15:32 | None | 300 | NOI 2024 Finals | 18 Mar 2024 20:49 | None | 300 | NOI Qualification Contest 2024 | 27 Feb 2024 16:24 | None | 300 | 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 |
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