Part (a)

Write the isLevelTrailSegment method that checks if a trail segment is level.

Solution

public boolean isLevelTrailSegment(int start, int end)
{
    for (int i = start; i < end; i++)
    {
        if (Math.abs(markers[i] - markers[i + 1]) > 10)
        {
            return false;
        }
    }
    return true;
}

Part (b)

Write the isDifficult method that determines if the trail is difficult based on elevation changes.

Solution

public boolean isDifficult()
{
    int count = 0;
    for (int i = 0; i < markers.length - 1; i++)
    {
        if (Math.abs(markers[i] - markers[i + 1]) >= 30)
        {
            count++;
        }
    }
    return count >= 3;
}

Key Concepts

Common Mistakes