4 ms·

I've solved #555 and #561, which were a lot of fun. Any other good recommendations? Some of the questions in that area look pretty intimidating, but those two w

I've solved #555 and #561, which were a lot of fun. Any other good recommendations? Some of the questions in that area look pretty intimidating, but those two were surprisingly approachable.

hxtk 9y ago
#601 is pretty easy. Also, #512 and #521 if you have some background in prime number theory.
utopcell 9y ago
#208 is what got me started