One-to-One with an Odd Sum
Difficulty: Hard · Topics: Discrete Mathematics, Functions, Function Combinatorics
Toq yig‘indili inyektiv funksiyalar
How many one-to-one functions f:\1, 2, 3\→\1, 2, …, 6\ make f(1)+f(2)+f(3) odd ?
Nechta inyektiv f:\1, 2, 3\→\1, 2, …, 6\ funksiyada f(1)+f(2)+f(3) toq bo‘ladi?