The team selection process for IMO in Ukraine consists of 4 rounds of olympiad exams […]
Fermat’s Little Theorem states that for a prime $p$ and an integer $a$ not divisible […]
Let $m,n \in \mathbb{N}$ and $n>m$. The Pigeonhole Principle states that if $n$ items are […]
Monovariant is a quantity related to the object that is monotonous under-considered operations. Problem (Tournament […]
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