HackerRank - Stryker code sprint - study code #6

PointFiltering_studycode_6.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
class Solution {
    const string PointNotFoundText = "Point doesn't exist in the bucket.";
    
    class Point {
        public int ID { get; set; }
        public decimal X { get; set; }
        public decimal Y { get; set; }
        public decimal Z { get; set; }
        
        public override string ToString() {
            return string.Format("{0} = ({1:F3},{2:F3},{3:F3})", ID, X, Y, Z);
        }
    }
    
    static Point CreatePoint(string[] vals) {
        return new Point {
            ID = int.Parse(vals[0]),
            X = decimal.Parse(vals[1]),
            Y = decimal.Parse(vals[2]),
            Z = decimal.Parse(vals[3])
        };
    }
    
    static Point FindPoint(IDictionary<int, Point> bucket, int k) {
        return bucket.ContainsKey(k) ? bucket[k] : null;
    }
    
    static bool RemovePoint(IDictionary<int, Point> bucket, Queue<Point> list, int k) {
        if (list.Count == 0)
            return false;
        if (bucket.ContainsKey(k))
            bucket.Remove(k);
        Point p = list.Dequeue();
        bucket[p.ID] = p;
        return true;
    }
    
    static void Main(String[] args) {
        int[] nb = Array.ConvertAll(Console.ReadLine().Split(' '), int.Parse);
        int n = nb[0], b = nb[1];
        
        var bucket = new Dictionary<int, Point>(b);
        var list = new Queue<Point>(n);
        
        // read points
        for (int i=0; i<n; i++) {
            list.Enqueue(CreatePoint(Console.ReadLine().Split(' ')));
        }
        
        // sort by Z descending
        list = new Queue<Point>(list.OrderByDescending(p => p.Z));
        
        // fill bucket
        for (int i=0; i<b; i++) {
            Point p = list.Dequeue();
            bucket[p.ID] = p;
        }
        
        while (true) {
            string qs = Console.ReadLine();
            if (string.IsNullOrWhiteSpace(qs))
                break;
            string[] q = qs.Split(' ');
            int k = int.Parse(q[1]);
            switch (q[0][0]) {
                case 'F':
                case 'f':
                Point p = FindPoint(bucket, k);
                Console.WriteLine(p != null ? p.ToString() : PointNotFoundText);
                break;
                case 'R':
                case 'r':
                Console.WriteLine(!bucket.ContainsKey(k) ? PointNotFoundText : RemovePoint(bucket, list, k) ? string.Format("Point id {0} removed.", k) : "No more points can be deleted.");
                break;
            }
        }
    }
}