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Problems

Brute force
Difficulty
Sort by
1475
Unbirthdays
Very easy
1488
Chess Puzzle
Very easy
1490
Moon
Easy
1491
Necklace
Easy
1493
Robot
Medium
1499
Lines
Very easy
1549
Barbarian tribes
1567
Sum And Product
Very easy
1568
Product Triplet
Very easy
1593
Elegant permuted sum
Very easy
1663
Bracket sequences
Very easy
1689
Durak game
Very easy
1705
A bit sequence of the Arnold
Very easy
1722
Sum it up
1776
Rails
Very easy
1800
Tic-tac-toe
Very easy
1801
Parenthesis
Very easy
1807
Railroad
Very easy
1808
Post Office
Very easy
1809
Aronson
Very easy
1815
Top This
Very easy
1821
Comparing Answers
Very easy
1841
DNA Robot
Very easy
1856
Championship on fungi Sports
Very easy
1862
Five-star challenge
Easy
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