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- Educational DP Contest AtCoder K - Stones
- Wesley's Anger Contest Reject 5 - Two Permutations
- CCC '24 J5 - Harvest Waterloo
- DMOPC '21 Contest 9 P3 - Terrible Trains
- DWITE '07 R3 #4 - The Convex Fence Company
- DMOPC '20 Contest 4 P1 - Missing Numbers
- SAC '22 Code Challenge 4 Junior P4 - Obligatory Permutation Problem