Problem #PRU-64427

Problems Discrete Mathematics Set theory and logic Mathematical logic Mathematical logic (other)

Problem

On the planet of liars and truth-tellers, the government hired \(100\) truth-tellers and \(100\) liars. Everyone has at least one friend, and if one alien is friends with another, then the feeling is mutual.
Exactly \(100\) of them said, “All my friends are honest,” and the other \(100\) said, “All my friends are liars.”
What is the smallest possible number of friendships between an honest alien and a liar?