Two Pairs with Equal Sums
Difficulty: Hard · Topics: Discrete Mathematics, Functions, Function Combinatorics
Yig‘indilari teng ikki juftlik
How many functions f:\1, 2, 3, 4\→\0, 1, 2\ satisfy f(1)+f(2)=f(3)+f(4)?
Nechta f:\1, 2, 3, 4\→\0, 1, 2\ funksiya f(1)+f(2)=f(3)+f(4) ni qanoatlantiradi?