def playSegments(segments):
    n = len(segments)
    player1_score = 0
    total_score = sum(1 if s == 1 else -1 for s in segments)

    # Player 2 plays all segments initially
    player2_score = total_score

    # Check if Player 1 should not play at all
    if player1_score > player2_score:
        return 0

    for i in range(n):
        # Calculate the score for Player 1 for each segment
        if segments[i] == 1:
            player1_score += 1
        else:
            player1_score -= 1

        # Update Player 2's score as if they start from the next segment
        player2_score -= 1 if segments[i] == 1 else -1

        # If Player 1's score is greater than Player 2's score from the next segment, return the segments Player 1 should play
        if player1_score > player2_score:
            return i + 1

    # If Player 1's score is never greater, they should not play any segments
    return 0