Problem sources

Problem Source
Problems
Average Difficulty
IPSC 200854.8Medium
Icelandic High School Competition 201412.5Easy
Icelandic High School Competition 201612Easy
International Collegiate Programming Contest (ACM-ICPC) Dress Rehearsal 2012123.7Medium
International Collegiate Programming Contest (ACM-ICPC) Dress Rehearsal 201514Medium
International Collegiate Programming Contest (ACM-ICPC) World Finals 2012126.7Hard
International Collegiate Programming Contest (ACM-ICPC) World Finals 2013116.3Hard
International Collegiate Programming Contest (ACM-ICPC) World Finals 2014126.4Hard
International Collegiate Programming Contest (ACM-ICPC) World Finals 2015134.9Medium
International Collegiate Programming Contest (ACM-ICPC) World Finals 2016135.7Hard
International Collegiate Programming Contest (ACM-ICPC) World Finals 2017125.2Medium
International Collegiate Programming Contest (ACM-ICPC) World Finals 2018115.3Medium
International Collegiate Programming Contest (ICPC) Challenge 201929.5Hard
Introduction to Algorithms, Danderyds Gymnasium33.4Medium
JobAgent Challenge 202154.9Medium
KTH CSC Avalg 200623.9Medium
KTH CSC Avancerade Algoritmer 200619.5Hard
KTH CSC Popup 2005284.4Medium
KTH CSC Popup 200644.5Medium
KTH CSC Popup 200716.1Hard
KTH CSC Popup 201624.3Medium
KTH CSC Popup spring 201334.4Medium
KTH Challenge16.2Hard
KTH Challenge 201174.4Medium
KTH Challenge 201264Medium
KTH Challenge 201384.7Medium
KTH Challenge 201495.7Hard
KTH Challenge 201574.8Medium
KTH Challenge 201675.8Hard
KTH Challenge 2016, adapted from KTH CSC Popup 2002 Session 115.3Medium
KTH Challenge 201795.8Hard
KTH Challenge 201886.2Hard
KTH Challenge 201985.1Medium
KTH Challenge 202086Hard
KTH Challenge 202175.8Hard
KTH Challenge 202295.6Hard
KTH Training305.2Medium
KTH Training 2010-09-0813.7Medium
KTH Training 201113.8Medium
KTH training 2011-01-2611.8Easy
KTH training, January 23, 201418.6Hard
Kattis61.8Easy
Kattis Challenge 201776.5Hard
Kodsport Summer Challenge 2020144.5Medium
LTH Challenge 201795.9Hard
LTH Challenge 201965.3Medium
LTH Challenge 202073.4Medium
LTH Challenge 202185.2Medium
LTH Challenge 202496.2Hard
LiU Coding Challenge 201856.4Hard
LiU Coding Challenge 201956Hard
Local Programming Contest at University of Alberta - October 20, 200113.6Medium
Lokakeppni TÖL607G HÍ 201963.4Medium
Mid-Central Regional Programming Contest 202443.8Medium
Mount Allison Practice17.5Hard
Mount Allison Programming Showdown (MAPS 2017)94.7Medium
Mount Allison Programming Showdown (MAPS 2019)135.2Medium
Mount Allison Programming Showdown (MAPS 2020)125.7Hard
Mount Allison Programming Showdown (MAPS 2022)136.1Hard
NCPC 2012 and KTH training18.8Hard
NENA 2019106.4Hard
NUS Competitive Programming1606.4Hard
Nada Open 200237.5Hard
Nada Open 200416.3Hard
Nada Open 2004/200526.3Hard
Nada Open 200556.7Hard
Nordic Collegiate Programming Contest (NCPC) 200585.1Medium
Nordic Collegiate Programming Contest (NCPC) 200695.2Medium
Nordic Collegiate Programming Contest (NCPC) 200794.9Medium
Nordic Collegiate Programming Contest (NCPC) 200895Medium
Nordic Collegiate Programming Contest (NCPC) 2008, adapted from Andrew Stankevich Contest 17, Petrozavodsk, February 2, 200618.1Hard
Nordic Collegiate Programming Contest (NCPC) 2009105.5Medium
Nordic Collegiate Programming Contest (NCPC) 2010115.4Medium
Nordic Collegiate Programming Contest (NCPC) 2011104.5Medium
Nordic Collegiate Programming Contest (NCPC) 2012125.4Medium
Nordic Collegiate Programming Contest (NCPC) 2013114.1Medium
Nordic Collegiate Programming Contest (NCPC) 2014114.8Medium
Nordic Collegiate Programming Contest (NCPC) 2015106.1Hard
Nordic Collegiate Programming Contest (NCPC) 2016115.1Medium
Nordic Collegiate Programming Contest (NCPC) 2017115.4Medium
Nordic Collegiate Programming Contest (NCPC) 2018115.4Medium
Nordic Collegiate Programming Contest (NCPC) 2019115.5Medium
Nordic Collegiate Programming Contest (NCPC) 2020135.6Hard
Nordic Collegiate Programming Contest (NCPC) 2021135.6Hard
Nordic Collegiate Programming Contest (NCPC) 2022115.5Hard
Nordic Collegiate Programming Contest (NCPC) 2023115.9Hard
Nordic Collegiate Programming Contest (NCPC) 2024115.8Hard
Nordic Olympiad in Informatics 201737.6Hard
Nordic Olympiad in Informatics 201837.6Hard
Nordic Olympiad in Informatics 202036.5Hard
Nordic Olympiad in Informatics 202135.5Hard
Nordic Olympiad in Informatics 202238.3Hard
Nordic Olympiad in Informatics 202337.7Hard
Nordic Olympiad in Informatics 202436.2Hard
North America Championship 2020125.8Hard
North American Invitational Programming Contest (NAIPC) 2014106.1Hard
North American Invitational Programming Contest (NAIPC) 2015106.9Hard
North American Invitational Programming Contest (NAIPC) 2016116.1Hard
North American Invitational Programming Contest (NAIPC) 2017115.9Hard
North American Invitational Programming Contest (NAIPC) 2018116.4Hard