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Problems

Topics
Difficulty
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7203
Party
Very hard
7204
Polyhedron
Very hard
7205
Private interests
Very easy
7206
Sleepwalker
Easy
7207
Square root
Very hard
7208
Linear Equations
Easy
7209
Chemistry
Easy
7210
Cube
Hard
7211
Numbers
Medium
7212
Factors
7213
Checkers on the cube
Very easy
7214
Common Element
Easy
7215
Labyrinth
Very easy
7216
Mixing Colours
Very hard
7217
It Can Be Arranged
Easy
7223
Binary Tree
Easy
7226
Calendar Day
Very easy
7227
School Ball
Easy
7228
How many sixs?
Medium
7229
The Gnome and the Coins
Medium
7230
Biprime number
Easy
7231
Colored cells
Hard
7232
Computer Configuration
Easy
7233
Space Travel
Easy
7234
Stepan's Air Conditioner
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