J’F Original Problems
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10-16th of April, 2017 Problems for JF’s 5 years jubilee, published with gratitude:
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Animated diagrams use Py2Web by Dmitri Turevski and WinChloe’s graphics. |
All previously published problems you can find in the subsections of Original Problems menu on the top. The judge of JF-2017(I) is not appointed yet. The judge of Retro & PG problems 2017-2018: Dirk Borst.
Heartfelt congratulations, Julia, for attaining the age of FIVE! Wish you grow like this for many more years serving the Problem world!