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IZhO 2023 Problem 2

    The tangent at CC to Ω\Omega , the circumcircle of scalene triangle ABCABC intersects ABAB at DD . Through point DD , a line is drawn that intersects segments ACAC and BCBC at KK and LL respectively. On the segment ABAB points MM and NN are marked such that AC∥NLAC \parallel NL and BC∥KMBC \parallel KM . Lines NLNL and KMKM intersect at point PP lying inside the triangle ABCABC . Let ω\omega be the circumcircle of MNPMNP . Suppose CPCP intersects ω\omega again at QQ . Show that DQDQ is tangent to ω\omega .

    Dataset text AI-MO AoPS. Quoted with source.

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