Erlang Are Equally Strong
-module(are_equally_strong).
-export([are_equally_strong/4]).

are_equally_strong(YourLeft, YourRight, FriendsLeft, FriendsRight) ->
    max(YourRight, YourLeft) =:= max(FriendsLeft, FriendsRight) andalso
    min(YourLeft, YourRight) =:= min(FriendsRight, FriendsLeft).

This compares each person’s strongest and weakest arm. If both pairs match, the result is true.