00:30 IST, 4th Nov: Some of these problems have editorials in https://www.iarcs.org.in/inoi/contests/allproblems.php under the Advanced Division. Also, many of these problems have solution discussions on Common Lounge.
00:30 IST, 4th Nov: All checkers have been added. Please comment on the problems if you find any issues.
15:30 IST, 9th Oct: These problems are from https://opc.iarcs.org.in/index.php/problems/. Some of the problems have multiple correct output, but the checkers have not been added yet. They will be added soon, and updated here.