In POW 2013-19, there was a typo in the assumption on \( a_1, \dots, a_{27} \). The inequality is now corrected to the equality.
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KAIST Math Problem of the Week
Weekly Math Challenges in KAIST
In POW 2013-19, there was a typo in the assumption on \( a_1, \dots, a_{27} \). The inequality is now corrected to the equality.