KöMaL 2023 K779
Given a four-digit number, the following transformations are allowed in each step: 1. We may change the order of the digits as we wish. 2. We may increase each of the first two digits by 1. Starting out from 2024, what is the least number of steps needed to obtain the number 7654?
Official text KöMaL. Quoted with source.
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