Free String
What is the best conflict-free 20-character string?
Ποια ειναι η βελτιστη without conflict συμβολοσειρα με 20 χαρακτηρες? Τι ειναι αυτη η συμβ / ρα?
I guess it's "abacadaebcbdbecdcede" but I can not understand what What a table without conflict! EDIT: As I understand it is a string with no string appears twice. eg abcab is not a cause of conflict-free chain "AB" appears twice in it. I suppose that one character is not considered a chain (sub-), chain free would otherwise conflict "abcdefgh" etc and there was no one (without conflict string) is better than another. NTUA students: i) abacadaebcbdbecdcede (με σύμβολα 5) ii) abacadaeafbcbdbebfcdcecfdedfef (μήκος 30) for exercises off, understand yourself!