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Problem StatementYou are given a positive integer $n$, and a prime number $p$ at least $5$. Find a triple of integers $(x,y,z)$ that satisfies all of 阅读全文
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Problem StatementThere are an integer $N$ and $M$ pairs of integers: $(a_1, b_1), (a_2, b_2), \dots, (a_M, b_M)$. Each pair $(a_i, b_i)$ satisfies $1 阅读全文
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Problem StatementYou are given positive integers $N$ and $K$. Find the number, modulo $998244353$, of integer sequences $\bigl(f(0), f(1), \ldots, f(2 阅读全文
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Problem StatementYou are given a string $S$ consisting of lowercase English letters. Print the number of non-empty strings $T$ that satisfy the follow 阅读全文