Back to 1 in Two Steps
Difficulty: Hard · Topics: Discrete Mathematics, Functions, Function Combinatorics
Ikki qadamda 1 ga qaytish
Let X=\1, 2, 3, 4\. How many functions f:X→ X satisfy fbig(f(1)big)=1?
X=\1, 2, 3, 4\ bo‘lsin. Nechta f:X→ X funksiya fbig(f(1)big)=1 ni qanoatlantiradi?