141634306 and 141634429 why one get accepted and the other not

Thanks for that implementation. I now understood it But why are you not printing cout.flush() after printing the query?

I thought of a similar line but there's a problem with that. First, there can be multiple occurrences of y as well so we cannot simply write (n-2)! for the remaining. Secondly, there can be multiple occurrences of x as well and in that case, the answer will be n!. I tried handling these 2 cases but it became very complex. The editorial's approach is quite simpler than that.

thanks! this visualisation made it much more clearer

didn't knew about your channel earlier, will definitely follow for more such content