string[] inputs = File.ReadAllLines("input.txt");

var a = new List<int>();
var b = new List<int>();
foreach (string input in inputs)
{
    string[] tokens = input.Split(" ", StringSplitOptions.RemoveEmptyEntries);
    a.Add(int.Parse(tokens[0]));
    b.Add(int.Parse(tokens[1]));
}

a = a.OrderBy(x => x).ToList();
b = b.OrderBy(x => x).ToList();
        
int totalDistance = a.Select((t, i) => Math.Abs(t - b[i])).Sum();

Console.WriteLine(totalDistance);

var aBucket = a.GroupBy(x => x);
var star2 = aBucket.Select(bucket => bucket.Key * b.Count(x => x == bucket.Key) * bucket.Count()).Sum();
Console.WriteLine(star2);