mars-lander1

Mars Lander - Episode 1

Description

This puzzle teaches you how to compare values using a simple condition. It's an introduction to the "Mars Lander" series of puzzles and requires only a simple condition to solve.

Solution Overview

The algorithm starts by reading the surface data. Then, it enters an infinite loop, continually reading the current state of the spacecraft and calculating the new thrust power based on the vertical speed. The thrust power is adjusted by one unit if the vertical speed exceeds the maximum allowed, and the new power value is adjusted to be within the valid range. The thrust power is adjusted by one unit if the vertical speed is below the minimum allowed, and the new power value is adjusted to be within the valid range. Finally, the new thrust power and rotation angle are printed to the console.

Code Example

using System;

class Player
{
    // Define constants for better readability and maintainability
    const int MAX_VERTICAL_SPEED = -40;  // Maximum allowed vertical speed before adjusting thrust
    const int MAX_THRUST_POWER = 4;      // Maximum thrust power
    const int MIN_THRUST_POWER = 0;      // Minimum thrust power

    static void Main(string[] args)
    {
        string[] inputs;
        int surfaceN = int.Parse(Console.ReadLine()); // the number of points used to draw the surface of Mars.
        for (int i = 0; i < surfaceN; i++)
        {
            inputs = Console.ReadLine().Split(' ');
            int landX = int.Parse(inputs[0]); // X coordinate of a surface point. (0 to 6999)
            int landY = int.Parse(inputs[1]); // Y coordinate of a surface point. By linking all the points together in a sequential fashion, you form the surface of Mars.
        }

        // game loop
        while (true)
        {
            inputs = Console.ReadLine().Split(' ');
            int hSpeed = int.Parse(inputs[2]); // the horizontal speed (in m/s), can be negative.
            int vSpeed = int.Parse(inputs[3]); // the vertical speed (in m/s), can be negative.
            int power = int.Parse(inputs[6]); // the thrust power (0 to 4).

            // Adjust thrust power based on the vertical speed using constants
            if (vSpeed <= MAX_VERTICAL_SPEED && power < MAX_THRUST_POWER) // Increase thrust if falling too fast
            {
                power++;
            }
            else if (vSpeed > MAX_VERTICAL_SPEED && power > MIN_THRUST_POWER) // Decrease thrust if falling slowly
            {
                power--;
            }

            // Output the desired rotation and power (rotation is always 0 for this level)
            Console.WriteLine("0 " + power);
        }
    }
}