Up, Then Down
Difficulty: Hard · Topics: Discrete Mathematics, Functions, Function Combinatorics
Avval yuqoriga, so‘ng pastga
How many functions f:\1, 2, 3, 4, 5\→\1, 2, 3, 4, 5\ satisfy
f(1) f(4) f(5) ?
Nechta f:\1, 2, 3, 4, 5\→\1, 2, 3, 4, 5\ funksiya quyidagini qanoatlantiradi?
f(1) f(4) f(5) ?