Middle European Mathematical Olympiad 2024 Problem I-3
Let be an acute scalene triangle. Choose a circle passing through and which intersects segments and again in points and , respectively. Let be the intersection of and . Let be the point on the circumcircle of such that is tangent to . Similarly, let be the point on the circumcircle of such that is tangent to . Prove that there exists a point , independent of the choice of , such that the circumcircle of passes through .