# Challenge 44 - Leaderboard Leader
results = [("Alex", 18), ("Bea", 22), ("Chen", 22), ("Dee", 15)]
if not results:
    print("No scores yet.")
else:
    top_score = max(score for name, score in results)
    winners = [name for name, score in results if score == top_score]
    if len(winners) == 1:
        print(f"Winner: {winners[0]} ({top_score})")
    else:
        print(f"Tie: {', '.join(winners)} ({top_score})")