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Problem authors

Problem Source
Problems
Average Difficulty
Larry D. Pyeatt26Hard
Larry Pyeatt32.8Easy
Lars Huth16.8Hard
Lars Åström33.6Medium
Lau Lap Chi14.9Medium
Law Wai Hon23.7Medium
Lawry Sorenson184.5Medium
Lech Duraj106.1Hard
Lee Chun Yin17Hard
Lenny Wu16.3Hard
Leo Osvald25.3Medium
Leszek Horwath16.7Hard
Leung Kai Man18.4Hard
Levi Sprung11.8Easy
Lewin Gan307.1Hard
Li Cheuk Ting28.1Hard
Liam Keliher514.7Medium
Liam Warfield11.6Easy
Logan Pipes16.6Hard
Loke Gustafsson96.5Hard
Louis Jachiet18.9Hard
Lovisa Diding23.2Medium
Luca Versari19.1Hard
Lucas Alber15.2Medium
Lucas Gretta36.1Hard
Lucas Schwebler36.5Hard
Lucas Wood13.3Medium
Lucas Xia35.6Hard
Ludo Pulles37.1Hard
Luis Hernández Corbato18.4Hard
Luka Kalinovčić55.3Medium
Luke DiGiovanna17.6Hard
Luke Son13.2Medium
Lukáš Poláček505.6Hard
Maarten Sijm93.7Medium
Maceo Cardinale Kwik17.5Hard
MachineFossil12.4Easy
Maciej Liskiewicz17.1Hard
Magne Vikjord35.8Hard
Magni Steinn Þorbjörnsson56.3Hard
Magnus Heghdal18.4Hard
Magnus Øian24.1Medium
Magnús Már Halldórsson54.6Medium
Mahbubul Hasan27.5Hard
Maj Stenmark93.2Medium
Malcolm Sharpe116Hard
Manuel Abellanas17.2Hard
Manuel Freire12.6Easy
Manuel Torres Cid17Hard
Maple17.4Hard
Marc Furon35.4Medium
Marc Phua Hsiao Meng106.5Hard
Marc Vinyals156Hard
Marcel Wienöbst35.1Medium
Marcin Kubica17.1Hard
Marcus Isaksson15.3Medium
Margarida Mamede44.4Medium
Marian Zuska14.7Medium
Marin Tomić94.4Medium
Mario Nakazawa12.2Easy
Marius Andrei16.3Hard
Mark Braganza15Medium
Mark Gordon17.4Hard
Mark McCormick18.1Hard
Mark Sturtevant83.4Medium
Mark Theng Kwang Hui26.7Hard
Mark Wen27.3Hard
Marko Berezovsky75.2Medium
Marko Ivanković103.9Medium
Markus Dregi46.4Hard
Markus Fanebust Dregi15.4Medium
Markus S. Dregi46.3Hard
Martin Kacer46.2Hard
Martin Kačer17.5Hard
Martin Macko13.6Medium
Martin Tran62.5Easy
Martynas Kriaučiūnas15.7Hard
Massimo Cairo19.1Hard
Mateusz Radecki17.5Hard
Mathijs de Weerdt12.8Medium
Matias Holte12.3Easy
Matija Milišić19Hard
Mats Petter Pettersson11.4Easy
Mats Petter Wallander19.4Hard
Matt Davison32.3Easy
Matt Fontaine26.6Hard
Matt Iverson16.9Hard
Matthew Iverson11.9Easy
Matthew Ng Zhen Rui64.2Medium
Matthias Bayerlein13.6Medium
Matthias Ruhl36.8Hard
Mattias Akke55Medium
Max Nilsson15.8Hard
Max Wilson12.3Easy
Maximilian Fichtl16.8Hard
Maximilliano Utomo Quok96.1Hard
Mees de Vries344.5Medium
Mehfuz A Rahman12.5Easy
Mete Saka22.9Medium
Micah Stairs66Hard
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