Problem 1 was criticized for being perhaps too simple for an international olympiad, acting more as a "points booster" than a differentiator for top talent.
A problem involving an acute triangle and perpendicular lines from a midpoint. The goal was to prove an equality between two angles, Comentarii JBMO 2015
for positive real numbers. The minimum value was found to be 3. Problem 1 was criticized for being perhaps too
This problem involved minimizing a specific expression given the constraint Comentarii JBMO 2015