Please, try EDU on Codeforces! New educational section with videos, subtitles, texts, and problems. ×


hey man, i am interested... count me in (if possible).

thank you for your help. now i understand how to solve it. thank u.

thank you very much. nice problem set. specially div2 C.

i can not understand div2 C problem correctly. can anyone help me in this plzz. the editorial is quite fast.