Power Sequence || Codeforces Round #666 || CODEFORCES

question link : http://codeforces.com/contest/1397/problem/B code link : https://pastebin.com/tu5v6XTE Telegram channel link : https://t.me/joinchat/QJnEnRxO5seEcniywdbS3w Instagram link : https://www.instagram.com/code_explainer/?hl=en