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Problem authors
Problem Source
Problems
Average Difficulty
Lau Lap Chi
1
4.7
Medium
Law Wai Hon
2
3.7
Medium
Lawry Sorenson
15
4.7
Medium
Lech Duraj
10
6
Hard
Lee Chun Yin
1
7
Hard
Lenny Wu
1
6.3
Hard
Leo Osvald
2
5.3
Medium
Leszek Horwath
1
6.9
Hard
Leung Kai Man
1
8.4
Hard
Levi Sprung
1
1.8
Easy
Lewin Gan
30
7.2
Hard
Li Cheuk Ting
2
8
Hard
Liam Keliher
49
4.7
Medium
Liam Warfield
1
1.8
Easy
Logan Pipes
1
6.6
Hard
Loke Gustafsson
9
6.6
Hard
Louis Jachiet
1
8.9
Hard
Lovisa Diding
2
3.2
Medium
Luca Versari
1
8.9
Hard
Lucas Alber
1
4.6
Medium
Lucas Gretta
3
6.2
Hard
Lucas Schwebler
3
6.6
Hard
Lucas Wood
1
3.3
Medium
Lucas Xia
3
5.8
Hard
Ludo Pulles
3
7.2
Hard
Luis Hernández Corbato
1
8.4
Hard
Luka Kalinovčić
5
5.3
Medium
Luke DiGiovanna
1
7.9
Hard
Luke Son
1
3.2
Medium
Lukáš Poláček
50
5.6
Hard
Maarten Sijm
9
4
Medium
Maceo Cardinale Kwik
1
7.5
Hard
MachineFossil
1
3
Medium
Maciej Liskiewicz
1
7.1
Hard
Magne Vikjord
3
5.9
Hard
Magni Steinn Þorbjörnsson
5
6.1
Hard
Magnus Heghdal
1
8.1
Hard
Magnus Øian
2
4.1
Medium
Magnús Már Halldórsson
5
4.7
Medium
Mahbubul Hasan
2
8.1
Hard
Maj Stenmark
9
3.2
Medium
Malcolm Sharpe
11
6
Hard
Manuel Abellanas
1
7.2
Hard
Manuel Freire
1
2.6
Easy
Manuel Torres Cid
1
7
Hard
Maple
1
7.5
Hard
Marc Furon
3
5.5
Medium
Marc Phua Hsiao Meng
10
6.5
Hard
Marc Vinyals
15
6.1
Hard
Marcel Wienöbst
3
5.6
Hard
Marcin Kubica
1
7.1
Hard
Marcus Isaksson
1
5.4
Medium
Margarida Mamede
4
4.4
Medium
Marian Zuska
1
4.4
Medium
Marin Tomić
9
4.5
Medium
Mario Nakazawa
1
2.2
Easy
Marius Andrei
1
6.3
Hard
Mark Braganza
1
5.1
Medium
Mark Gordon
1
7.4
Hard
Mark McCormick
1
7.8
Hard
Mark Sturtevant
3
3.9
Medium
Mark Theng Kwang Hui
2
6.8
Hard
Mark Wen
1
8.5
Hard
Marko Berezovsky
7
5.3
Medium
Marko Ivanković
10
3.8
Medium
Markus Dregi
4
6.4
Hard
Markus Fanebust Dregi
1
5.4
Medium
Markus S. Dregi
4
6.4
Hard
Martin Kacer
4
6.3
Hard
Martin Kačer
1
7.5
Hard
Martin Macko
1
3.6
Medium
Martin Tran
6
2.5
Easy
Martynas Kriaučiūnas
1
6.2
Hard
Massimo Cairo
1
9.2
Hard
Mateusz Radecki
1
7.5
Hard
Mathijs de Weerdt
1
2.6
Easy
Matias Holte
1
2.4
Easy
Matija Milišić
1
8.9
Hard
Mats Petter Pettersson
1
1.4
Easy
Mats Petter Wallander
1
9.4
Hard
Matt Davison
3
2.4
Easy
Matt Fontaine
2
6.6
Hard
Matt Iverson
1
7.5
Hard
Matthew Iverson
1
1.9
Easy
Matthew Ng Zhen Rui
6
4.2
Medium
Matthias Bayerlein
1
3.6
Medium
Matthias Ruhl
3
6.8
Hard
Mattias Akke
5
5
Medium
Max Nilsson
1
5.8
Hard
Max Wilson
1
2.3
Easy
Maximilian Fichtl
1
6.9
Hard
Maximilliano Utomo Quok
9
5.9
Hard
Mees de Vries
34
4.6
Medium
Mehfuz A Rahman
1
2.6
Easy
Mete Saka
2
3.1
Medium
Micah Stairs
6
6.1
Hard
Michael Baer
1
6.7
Hard
Michael Bradet-Legris
1
3.4
Medium
Michael C Slattery
1
6.1
Hard
Michael Goldwasser
7
4.7
Medium
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