Here are the video solutions in the form of a post-contest discussion for problems A, B, C of Codeforces Round 997. The live discussion was done with students of TLE Eliminators, this is the recording of the same. We hope this will be useful for you in up-solving this contest.
Solution Codes:
Shape Perimeter: https://codeforces.com/contest/2056/s...
Find the Permutation: https://codeforces.com/contest/2056/s...
Palindromic Subsequences: https://codeforces.com/contest/2056/s...
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Timestamps:-
00:00 Shape Perimeter
22:10 Find the Permutation
1:03:25 Palindromic Subsequences