Achievement: Solve 10 1d problems

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Solve 10 1d problems

Solve 10 1d problems.

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Leandroratt 7k, preme 2k, Bulat Murtazin 2k, vitalhalk 2k, Babaykago 3k, Jerry 4k, otari tchigladze 2k, GetStrong 2k, paulrzcz 5k, Konkon 4k

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