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Problems

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479
Cross-stitch Embroidery
Very easy
480
Exponentiation - 2
Very easy
481
Repeat: how many times to repeat?
Hard
482
Tri Tiling
483
Cut frame
Hard
484
Линейный чёрный ящик
Hard
485
Collision balls
Hard
486
Inexact string
Very hard
487
Discrete logarithm
Easy
488
Bypass matrix with "snake"
489
Бермудский треугольник
Easy
490
Coding
491
Palindrome
Hard
492
Transformations
Easy
493
Decomposition
Easy
494
AEIOUY
495
Expansion of
Easy
496
Permutation
Very easy
497
Lazybones
Very easy
498
Mythical Chess
Very easy
499
Dream
Easy
500
Repair
Very easy
501
Playing the fool
Medium
502
Грибной дождь
Very easy
503
Honey
Easy
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