Even if it takes you 7 years to upsolve a problem, there is no point in not doing it eventually.
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W congrats man
Thanks!
That's one of the secrets of growing
There is always something new to learn, even after many years, and in addition it serves me very well in the pledge to deliver the best experience to my students.
totally agree
I have something similar, it isn't 7 years it's 4 month, but it was worth it, 1879D - Sum of XOR Functions, is such a useful and teaching problem and solving it gave me the ability to solve a lot of more problems
Haha, I also upsolved problems from a contest I participated 9 years ago
Oh wow, nice one!
I guess there's no saturation point..There's always some space left for growth ^-^
Always a big W to crack down something that had haunted you since the far past. Keep it up man.