Задачи
Brackets#1994
Лесно · Data Structures
How can I help?#1995
Многу тешко · Dynamic programming
Cupcakes#1996
Лесно · Math
Approaching by progression#1997
Многу лесно · Math
Tori#1998
Лесно · Geometry
Palindrome#1999
Тешко · Strings
Minefield#2000
Тешко · Greedy algorithms
Device Survey#2001
Многу лесно · Binary Search · Graphs
Pattern Coloring#2002
Лесно · Sorting · Prefix Sums
Cellular communication#2003
Тешко · Graphs · Brute force
Routing#2004
Многу тешко · Binary Search
Weighing 2#2005
Многу тешко · Brute force · Combinatorics · Dynamic programming · Implementation · Graphs
Plus and xor#2006
Лесно · Bitmasks
Gift#2007
Средно · Graphs · Greedy algorithms
Tourist#2008
Средно · Binary Search
Points#2009
Лесно · Math
Mice and Cheese#2010
Лесно · Greedy algorithms · Sorting
Mutation#2011
Средно · Dynamic programming · Implementation
Sequence#2012
Многу лесно · Dynamic programming
Area of the hexagon#2013
Многу лесно · Geometry
Lucky Number#2014
Многу лесно · Implementation
Game XOR#2015
Тешко · Games · Math · Combinatorics
Determinant of the matrix#2017
Лесно · Matrix
Minimal d-exponent#2018
Средно · Number theory · Brute force
Fibonacci sequence#2019
Средно · Hashing · Dynamic programming