Hello Codeforces!

I would like to invite you to take part in HackerEarth's October Easy '23!. It will be held on Saturday, October 7, 2023 at 9:30 AM IST.

The problems were written and tested by me (Deepu DPUYDV Yadav), Kritagya krikti Agarwal, Vinayak kawaki_styles Mishra, Ankit Ankit_132 Ghildiyal, Priyanshu dip_is_trend Shukla, Prakhar jalanprakhar Jalan.

Also many thanks to Ujjwal ujjwald7 Dwivedi for coordinating the contest.

You will be given 5 algorithmic problems to solve in 3 hours.

Although the contest is targeted toward beginners, we hope that everyone finds the tasks interesting. The contest is rated for all and the prizes will be awarded to the top 3 beginners (i.e. participants with a rating less than 1600 before the challenge starts):

Good luck everyone, and feel free to discuss the problems here when the contest ends.

I was solving problem Buying gifts. I am getting wrong answer if I use ordered_multiset(pbds) submission link. If I use std::multiset instead of ordered_multiset than solution gets accepted submission link. Can somebody explain why and what am I doing wrong???

Note : Sorry for my bad English.