(Idea of the problem A — ----------)
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Code — 51241276
(Idea of the problem B — IbragiMMamilov)
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Code — 51241302
(Idea of the problem C — usertab34)
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Code — 51241318
(Idea of the problem D — Denisson)
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Code — 51241330
(Idea of the problem E — Ralsei)
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Code — 51241345