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www.mikescher.com/www/statics/aoc/2018/06-1.linq

35 lines
1.0 KiB
C#

<Query Kind="Statements" />
var coords = File
.ReadAllLines(Path.Combine(Path.GetDirectoryName(Util.CurrentQueryPath), @"06_input.txt"))
.Where(p => !string.IsNullOrWhiteSpace(p))
.Select(l => (int.Parse(l.Split(',')[0].Trim()), int.Parse(l.Split(',')[1].Trim())) )
.ToList();
int[][] d = new int[2][];
for (int i = 0; i < 2; i++)
{
var minX = coords.Min(p => p.Item1)-i;
var maxX = coords.Max(p => p.Item1)+i;
var minY = coords.Min(p => p.Item2)-i;
var maxY = coords.Max(p => p.Item2)+i;
int[,] map = new int[1+maxX-minX, 1+maxY-minY];
d[i] = new int[coords.Count];
for (int x = minX; x <= maxX; x++)
for (int y = minX; y <= maxY; y++)
{
var s = coords.Select((c, idx) => new { I = idx, D = Math.Abs(c.Item1 - x) + Math.Abs(c.Item2 - y), V = c }).OrderBy(c => c.D).ToList();
if (s[0].D == s[1].D) { map[x-minX, y-minY]=-1; continue; }
d[i][s[0].I]++;
map[x-minX, y-minY]=s[0].I;
}
//map.Dump();
}
//d[0].Zip(d[1], (a, b) => (a, b)).Dump();
d[0].Zip(d[1], (a, b) => (a, b)).Where(p => p.a == p.b).Max().a.Dump();