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Problems

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Difficulty
Sort by
2349
Races
Easy
2358
Chess
Very easy
2364
Clock
Very easy
2371
Black Square
Easy
2372
Cube Coloring
Very easy
2375
Flat
Very easy
2377
High security
Medium
2381
Two times two
Very easy
2386
The next permutation
Easy
2389
The following combination
Very easy
2391
Cost of call
Easy
2396
The number in English
Very easy
2397
Windows
Medium
2413
A-B
Medium
2417
Multiplication
Very easy
2418
Number
Very easy
2419
Order
Very easy
2440
n-th Largest Value
Very easy
2456
Stock Prices
Very easy
2458
Wormly
Hard
2471
From adjacency matrix to the list of edges
Very easy
2484
Sequence Formatting
Easy
2486
Two instructions
Easy
2497
Tariffs
Easy
2507
Border
Very easy
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