Dv
str.Length == str.Distinct().Count()
Size: a a a
Dv
str.Length == str.Distinct().Count()
ШН
str.Length == str.Distinct().Count()
NP
str.Length == str.Distinct().Count()
NT
NT
NT
NK
NT
NK
NK
O
NK
NK
NK
O
β🎀
list.Any(x => list.Count(y => y == x) > 1)
Dv
NK
Dv