Пример #1
0
    /// <summary>
    /// Gets the number of unique houses that Santa delivers at least one present to.
    /// </summary>
    /// <param name="instructions">The instructions Santa should follow.</param>
    /// <returns>The number of unique houses that receive a delivery of at least one present.</returns>
    internal static int GetUniqueHousesVisitedBySanta(string instructions)
    {
        var directions = GetDirections(instructions);

        var santa       = new SantaGps();
        var coordinates = new HashSet <Point>();

        foreach (var direction in directions)
        {
            coordinates.Add(santa.Location);
            santa.Move(direction);
        }

        return(coordinates.Count);
    }
Пример #2
0
        /// <summary>
        /// Gets the number of unique houses that Santa delivers at least one present to.
        /// </summary>
        /// <param name="instructions">The instructions Santa should follow.</param>
        /// <returns>The number of unique houses that receive a delivery of at least one present.</returns>
        internal static int GetUniqueHousesVisitedBySanta(string instructions)
        {
            ICollection<CardinalDirection> directions = GetDirections(instructions);

            var santa = new SantaGps();
            var coordinates = new List<Point>();

            foreach (var direction in directions)
            {
                if (!coordinates.Contains(santa.Location))
                {
                    coordinates.Add(santa.Location);
                }

                santa.Move(direction);
            }

            return coordinates.Count;
        }
Пример #3
0
        /// <summary>
        /// Gets the number of unique houses that Santa and Robo-Santa deliver at least one present to.
        /// </summary>
        /// <param name="instructions">The instructions that Santa and Robo-Santa should follow.</param>
        /// <returns>The number of unique houses that receive a delivery of at least one present.</returns>
        internal static int GetUniqueHousesVisitedBySantaAndRoboSanta(string instructions)
        {
            ICollection<CardinalDirection> directions = GetDirections(instructions);

            var santa = new SantaGps();
            var roboSanta = new SantaGps();
            var current = santa;

            var coordinates = new List<Point>();

            foreach (var direction in directions)
            {
                current.Move(direction);

                if (current.Location != Point.Empty && !coordinates.Contains(current.Location))
                {
                    coordinates.Add(current.Location);
                }

                current = current == santa ? roboSanta : santa;
            }

            return coordinates.Count + 1;
        }
Пример #4
0
    /// <summary>
    /// Gets the number of unique houses that Santa and Robo-Santa deliver at least one present to.
    /// </summary>
    /// <param name="instructions">The instructions that Santa and Robo-Santa should follow.</param>
    /// <returns>The number of unique houses that receive a delivery of at least one present.</returns>
    internal static int GetUniqueHousesVisitedBySantaAndRoboSanta(string instructions)
    {
        var directions = GetDirections(instructions);

        var santa     = new SantaGps();
        var roboSanta = new SantaGps();
        var current   = santa;

        var coordinates = new HashSet <Point>();

        foreach (var direction in directions)
        {
            current.Move(direction);

            if (current.Location != Point.Empty)
            {
                coordinates.Add(current.Location);
            }

            current = current == santa ? roboSanta : santa;
        }

        return(coordinates.Count + 1);
    }