Basecamp

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Game with a tree

Festive Sugar Modulus Calculations

Important scientific number

Chasing a butterfly

Conflict of interests

School correspondence

Marathon runner

Ksonya and the Olympiad

Ksonya and the Alphabet Circle

Ksonya and the Two-Color Figure

Xonya and graph

Xonya and the Tree

Cossack Vus and the Secret Letter

Kozak Vus and the Magical Boots

Cossack Vus and the Railway

Cossack Vus and the Tree

Cossack Vus and the Count

Contest results

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