Youtube activity of "Sergey Semendyaev" (@SergeySemendyaev) on "Vert Dider" channel.
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UCbYE9MoVxaJVbGmEM26xIzg
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Sergey Semendyaev
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@SergeySemendyaev
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"Разгадка, в которую невозможно поверить: задача о 100 заключённых [Veritasium]"
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