Hi, i want to know about this website : https://projecteuler.net/archives. I have two question, first how can i learn euler graph anh his circuit ez anh fast. second is how to learn IOI when i'm in Asia. i need to know this please tell me that.

finally, i want to ask how solve this problems by c++ : https://projecteuler.net/problem=780.

thank you to answer my question!

if i have anything no well, you can sent to me , please don't dislike my blog.

please please bro help me i'm poor guys