Added day 3 solution.

This commit is contained in:
Brandon Scott 2018-12-09 04:06:09 -06:00
parent fd37f04058
commit b504ad720b
4 changed files with 1510 additions and 1 deletions

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@ -12,6 +12,9 @@
<None Update="Input\Day2Input.txt"> <None Update="Input\Day2Input.txt">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None> </None>
<None Update="Input\Day3Input.txt">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>
</ItemGroup> </ItemGroup>
</Project> </Project>

1383
AoC2018/Input/Day3Input.txt Normal file

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@ -0,0 +1,124 @@
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
namespace AoC2018.Solutions
{
public class Day3Solution : Solution
{
public override string Title => "No Matter How You Slice It";
public override int Day => 3;
public override void Run()
{
string[] input = File.ReadAllLines(Path.Combine("Input", "Day3Input.txt"));
Console.WriteLine($"Part 1: {CalculatePart1(input)}");
Console.WriteLine($"Part 2: {CalculatePart2(input)}");
}
public int CalculatePart1(string[] input)
{
List<Claim> claims = new List<Claim>();
int maxX = 0, maxY = 0;
foreach (var s in input)
{
var claim = new Claim(s);
maxX = Math.Max(maxX, claim.X + claim.Width);
maxY = Math.Max(maxY, claim.Y + claim.Height);
claims.Add(claim);
}
int[] map = new int[maxX * maxY];
foreach (Claim claim in claims)
{
for (int y = 0; y < claim.Height; y++)
for (int x = 0; x < claim.Width; x++)
map[(maxX * (claim.Y + y)) + (claim.X + x)]++;
}
int count = 0;
for (int y = 0; y < maxY; y++)
{
for (int x = 0; x < maxX; x++)
{
if (map[y * maxX + x] > 1)
count++;
}
}
return count;
}
public int CalculatePart2(string[] input)
{
List<Claim> claims = new List<Claim>();
int maxX = 0, maxY = 0;
foreach (var s in input)
{
var claim = new Claim(s);
maxX = Math.Max(maxX, claim.X + claim.Width);
maxY = Math.Max(maxY, claim.Y + claim.Height);
claims.Add(claim);
}
int[] map = new int[maxX * maxY];
foreach (Claim claim in claims)
{
for (int y = 0; y < claim.Height; y++)
for (int x = 0; x < claim.Width; x++)
map[(maxX * (claim.Y + y)) + (claim.X + x)]++;
}
foreach (Claim claim in claims)
{
bool clean = true;
for (int y = 0; y < claim.Height; y++)
for (int x = 0; x < claim.Width; x++)
{
if (map[(maxX * (claim.Y + y)) + (claim.X + x)] > 1)
clean = false;
}
if (clean)
return claim.Index;
}
return -1;
}
}
public class Claim
{
public int Index { get; set; }
public int X { get; set; }
public int Y { get; set; }
public int Width { get; set; }
public int Height { get; set; }
public Claim(string line)
{
Match match = Regex.Match(line, @"#(\d+) @ (\d+),(\d+): (\d+)x(\d+)");
if (match.Success)
{
Index = int.Parse(match.Groups[1].Value);
X = int.Parse(match.Groups[2].Value);
Y = int.Parse(match.Groups[3].Value);
Width = int.Parse(match.Groups[4].Value);
Height = int.Parse(match.Groups[5].Value);
}
}
public override string ToString()
{
return $"Index: {Index}, Pos: {X},{Y}, Size: {Width}x{Height}";
}
}
}

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@ -8,7 +8,6 @@ namespace AoC2018.Solutions
{ {
public abstract string Title { get; } public abstract string Title { get; }
public abstract int Day { get; } public abstract int Day { get; }
public abstract void Run(); public abstract void Run();
} }
} }