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Problems
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Problems

Topics
Difficulty
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405
Crazy Frog
Very easy
406
Directions
Medium
407
Exchange
Very easy
408
Fence
Very easy
409
Game
Medium
410
Hadron Collider
Medium
411
Intersection
Medium
412
Jammed
Easy
413
Euclidean Algorithm
Medium
414
Equation
Medium
415
"Beautiful" permutations
Easy
416
Lectures
Hard
417
Amount
Hard
418
Triangle
Very easy
419
The 3n + 1 problem
Very easy
420
From guns to the Moon
Very easy
421
Yo-Yo
Very easy
422
Snake
Easy
423
Award
Very easy
424
Rectangles
Very easy
425
Chess
Easy
426
Division
Medium
427
Assessment
Very easy
428
Cannon
Very easy
429
Game Zuma
Medium
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