Hello, I'm relatively new to cpp and codeforces. Ive been working the problem 1494A fora long time now, but I am still failing at some testcases. Could anyone just provide me a hint as to what I'm doing wrong. Any advices in general are also appreciated....Thank you in advance :)

Here's my solution : 144508668 to the problem: https://mirror.codeforces.com/problemset/problem/1494/A

In the past div 2 this guy uploaded solutions on youtube, and again this time he uploaded, please do something CF.

https://www.youtube.com/channel/UCXBKGFfNg1DzrN6rZo_sZdg/videos

Video(737A) — https://www.youtube.com/watch?v=1pKLMqZkoEo