Problem sources

Problem Source
Problems
Average Difficulty
IDI Open 2021125.5Medium
IEEEXtreme 9.015.4Medium
IPSC 200025.8Hard
IPSC 200326.1Hard
IPSC 200412.4Easy
IPSC 200534Medium
IPSC 200633Medium
IPSC 200734.4Medium
IPSC 200855Medium
Icelandic High School Competition 201412.4Easy
International Collegiate Programming Contest (ACM-ICPC) Dress Rehearsal 2012124Medium
International Collegiate Programming Contest (ACM-ICPC) Dress Rehearsal 201513.7Medium
International Collegiate Programming Contest (ACM-ICPC) World Finals 2012126.7Hard
International Collegiate Programming Contest (ACM-ICPC) World Finals 2013116.2Hard
International Collegiate Programming Contest (ACM-ICPC) World Finals 2014126.3Hard
International Collegiate Programming Contest (ACM-ICPC) World Finals 2015134.9Medium
International Collegiate Programming Contest (ACM-ICPC) World Finals 2016135.8Hard
International Collegiate Programming Contest (ACM-ICPC) World Finals 2017125.2Medium
International Collegiate Programming Contest (ACM-ICPC) World Finals 2018115.4Medium
International Collegiate Programming Contest (ICPC) Challenge 201929.5Hard
Introduction to Algorithms, Danderyds Gymnasium34.3Medium
JobAgent Challenge 202154.8Medium
KTH CSC Avalg 200623.7Medium
KTH CSC Avancerade Algoritmer 200619.5Hard
KTH CSC Popup 2005284.3Medium
KTH CSC Popup 200644.5Medium
KTH CSC Popup 200716.1Hard
KTH CSC Popup 201624.6Medium
KTH CSC Popup spring 201333.9Medium
KTH Challenge17.5Hard
KTH Challenge 201174.4Medium
KTH Challenge 201264.2Medium
KTH Challenge 201384.7Medium
KTH Challenge 201495.6Hard
KTH Challenge 201574.9Medium
KTH Challenge 201675.9Hard
KTH Challenge 2016, adapted from KTH CSC Popup 2002 Session 115.2Medium
KTH Challenge 201795.8Hard
KTH Challenge 201886.2Hard
KTH Challenge 201985.1Medium
KTH Challenge 202086.2Hard
KTH Challenge 202175.9Hard
KTH Challenge 202295.4Medium
KTH Training305.3Medium
KTH Training 2010-09-0813.7Medium
KTH Training 201113.8Medium
KTH training 2011-01-2612.3Easy
KTH training, January 23, 201418.6Hard
Kattis61.7Easy
Kattis Challenge 201776.7Hard
Kodsport Summer Challenge 2020144.7Medium
LTH Challenge 201796Hard
LTH Challenge 201965.3Medium
LTH Challenge 202073.4Medium
LTH Challenge 202185.2Medium
LTH Challenge 202495.6Hard
LiU Coding Challenge 201856.4Hard
LiU Coding Challenge 201956Hard
Local Programming Contest at University of Alberta - October 20, 200113.6Medium
Lokakeppni TÖL607G HÍ 201963.2Medium
Mid-Central Regional Programming Contest 202443.8Medium
Mount Allison Practice17.6Hard
Mount Allison Programming Showdown (MAPS 2017)94.9Medium
Mount Allison Programming Showdown (MAPS 2019)135.1Medium
Mount Allison Programming Showdown (MAPS 2020)125.6Hard
Mount Allison Programming Showdown (MAPS 2022)136Hard
NCPC 2012 and KTH training18.9Hard
NENA 2019106.4Hard
NUS Competitive Programming1606.5Hard
Nada Open 200237.5Hard
Nada Open 200416.4Hard
Nada Open 2004/200526.7Hard
Nada Open 200556.6Hard
Nordic Collegiate Programming Contest (NCPC) 200585.1Medium
Nordic Collegiate Programming Contest (NCPC) 200695.4Medium
Nordic Collegiate Programming Contest (NCPC) 200794.9Medium
Nordic Collegiate Programming Contest (NCPC) 200894.9Medium
Nordic Collegiate Programming Contest (NCPC) 2008, adapted from Andrew Stankevich Contest 17, Petrozavodsk, February 2, 200617.3Hard
Nordic Collegiate Programming Contest (NCPC) 2009105.5Medium
Nordic Collegiate Programming Contest (NCPC) 2010115.6Hard
Nordic Collegiate Programming Contest (NCPC) 2011104.5Medium
Nordic Collegiate Programming Contest (NCPC) 2012125.6Hard
Nordic Collegiate Programming Contest (NCPC) 2013114.4Medium
Nordic Collegiate Programming Contest (NCPC) 2014115Medium
Nordic Collegiate Programming Contest (NCPC) 2015106.3Hard
Nordic Collegiate Programming Contest (NCPC) 2016115Medium
Nordic Collegiate Programming Contest (NCPC) 2017115.7Hard
Nordic Collegiate Programming Contest (NCPC) 2018115.4Medium
Nordic Collegiate Programming Contest (NCPC) 2019115.5Hard
Nordic Collegiate Programming Contest (NCPC) 2020135.8Hard
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) 2024115.7Hard
Nordic Olympiad in Informatics 201737.3Hard
Nordic Olympiad in Informatics 201837.6Hard
Nordic Olympiad in Informatics 202036.5Hard
Nordic Olympiad in Informatics 202136Hard
Nordic Olympiad in Informatics 202238.4Hard
Nordic Olympiad in Informatics 202337.5Hard