Year2015Day02.cs

using System;
using System.Collections.Generic;
using System.Linq;
using AdventOfCode.Common;
using JetBrains.Annotations;

namespace AdventOfCode.Solutions._2015._2;

[UsedImplicitly]
public class Year2015Day02 : ISolution
{
	public object Part1(IEnumerable<string> input)
	{
		var result = 0;
		foreach (var dimension in input)
		{
			var dims = dimension.Split('x').Select(int.Parse).ToList();
			int l = dims[0],
				w = dims[1],
				h = dims[2];
			var smallestSide = Math.Min(Math.Min(l * w, w * h), h * l);
			result += smallestSide + 2 * l * w + 2 * w * h + 2 * h * l;
		}
		return result.ToString();
	}

	public object Part2(IEnumerable<string> input)
	{
		var result = 0;
		foreach (var dimension in input)
		{
			var dims = dimension.Split('x').Select(int.Parse).ToList();
			dims.Sort();
			result += dims[0] * 2 + dims[1] * 2 + dims.Aggregate((i, w) => i * w);
		}
		return result.ToString();
	}
}