I solved 1799B Equalize by Divide using a constructive algorithm. I also noticed that there was a math tag on the problem. What's the math solution to this problem?
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skill issue
You can literally put math tag for any problem, even if it doesn't require any advanced math.
I don't see how math has anything to do with this problem.
Bounding the total number of operations of the algorithm in the editorial requires mathematical analysis, even if you may call it elementary.
How about 1790C Premutation?