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Problems

Topics
Difficulty
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837
Permutations
Very easy
838
Route
Very easy
839
Segments intersection
Easy
840
Long sum
Very easy
841
Spiral
842
The prime factors
Very easy
843
Permutation of letters
Very easy
844
Moneybox
Very easy
845
The card and envelope
Medium
846
Long product
Medium
847
Snake
Very easy
848
Perfect numbers
Easy
849
Decomposition into terms
Very easy
850
Gangsters
Very easy
851
The area of a polygon
Very easy
852
Long division on a short number
Very easy
853
Sereja and Array
Very easy
854
Friendly numbers
Easy
855
Brackets (2)
Very easy
856
Route 2
Very easy
857
Convex hull
Very easy
858
Birthday
Very easy
859
Amounts
Very easy
860
The game of "Date"
Easy
861
Matrix Summation
Very easy
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