RE in Chef and Alphabets(WANNABET)

help
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CodeChef: Practical coding for everyone I did this question using ordered_set but its giving run-time error, sample test cases are passing on my compiler, I am not able to figure out the mistake. please help :pensive:
here is the link to my submission

https://www.codechef.com/viewsolution/36511718

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int d;
				d--;
				char ch;
				cin >> d >> ch;

You probably want the d-- to be performed after you read in the d :slight_smile:

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In line number 95 the the index that are inserted are 0 based but when you are trying to access them in line 108, the indexing is 1 based.
Just add a d-=1 before line 108 and your code is GTG!
I’ve tested it on the server. It’s giving AC.

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Exactly!!

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How dumb I am
Thank you very much!
I wasted 1.5 hours in it, U literally saved my 2-3 hours :slightly_smiling_face:

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I didn’t paid attention to 10^4 and coded it using fenwik tree :confused: