AtCoder Beginner Contest 177 || Problem A, B, C, D || ATCODER

question link : https://atcoder.jp/contests/abc177/tasks code link : A : https://pastebin.com/fWEnMkis B : https://pastebin.com/LvRGu0e5 C : https://pastebin.com/Yv7g3vTw D: https://pastebin.com/6LXDxnT5 Telegram channel link : https://t.me/joinchat/QJnEnRxO5seEcni... Instagram link : https://www.instagram.com/code_explai...