RCPC 2026 (#1668) 14 problems
A. Among Us (#4528)B. Backstab Boulevard (#4529)C. Common Decoding (#4530)D. Divisors (#4531)E. Enchanted Tree (#4532)F. Funny Permutations (#4533)G. Game on a Tree (#4534)H. Happy Triplets (#4535)I. Ilie and the Binary Messages (#4536)J. Julia and the Festival (#4537)K. Kingdom Compression (#4538)L. Ladder Permutation Swap (#4539)M. Mira and the Random DFS (#4540)N. Neighbors from Hell (#4541)