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BALKAN-SL 2021 G6

    Let ABCA B C be an acute triangle such that AB<ACA B<A C. Let ω\omega be the circumcircle of ABCA B C and assume that the tangent to ω\omega at AA intersects the line BCB C at DD. Let Ω\Omega be the circle with center DD and radius ADA D. Denote by EE the second intersection point of ω\omega and Ω\Omega. Let MM be the midpoint of BCB C. If the line BEB E meets Ω\Omega again at XX, and the line CXC X meets Ω\Omega for the second time at YY, show that A,YA, Y and MM are collinear.

    Dataset text NuminaMath olympiads. Quoted with source.

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