Why Idleness limit is occurring even though I have used cout.flush(); Help would be really appreciated Question Link My Solution

I don't understand why my code is giving TLE. It would be great if someone helps me out, I am really stuck in this question.

QUESTION SOLUTION

As for reference this code has been accepted REf. Code

My code is given WA verdict on G++ 17, and G++ 14, but the same code is accepted on G++ 20 can anyone tell me how this is possible? Question Link My Answer(accepted) My Answer(WA)