expectation of the length of a random permutation is 2sqrtN. randomize the sequence with another fixed permutation which both steps share.
QOJ.ac
QOJ
Discussion #2293 for Problem #13651. Magic Trick
Type: Editorial
Status: Open
Posted by: isthis_dejavu
Posted at: 2026-08-08 14:54:48
Last updated: 2026-08-08 14:56:22
New Editorial for Problem #13651
Comments
No comments yet.