About the difficulty tag

Revision en1, by xcx2010, 2024-02-06 05:35:15

Some of the problem's difficulty seems strange. Like 1909I - Short Permutation Problem, it's obvious not only 1900. Also, 1919H - Tree Diameter is wrong too (I remember it's 3500 before). Why?

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en1 English xcx2010 2024-02-06 05:35:15 192 Initial revision (published)