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Давайте обсудим задачи.↵
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Почему в задаче [SANDWICH](https://www.codechef.com/MAY17/problems/SANDWICH) ответ такое --> ${C\binom{N/K-N\%K+K}{N/K}}$↵
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Как решать задачу
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Let's discuss problems↵
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Why answer will be ${C\binom{N/K-N\%K+K}{N/K}}$ for [SANDWICH](https://www.codechef.com/MAY17/problems/SANDWICH) ?↵
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And how to solve [KILLER](https://www.codechef.com/MAY17/problems/KILLER/)?
