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SMO 2026 Senior Round 1 Question 21

SMO · SMO 2026 Senior Round 1

Question 21

Let $m(x)$ be the unique monic polynomial (leading coefficient $1$) of degree $67$ with rational coefficients such that
$$\frac{1+67^{1/67}+67^{2/67}+\cdots+67^{66/67}}{66}$$
is one of its roots. Let $A$ denote the coefficient of $x^2$ in $m(x)$. Find the value of $|\lfloor A\rfloor|$.