céges autó

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;

namespace cegesauto
{
    class Program
    {
        struct adat{
            public int nap, az, km, kibe;
            public string oraperc, rsz;
        }

        static adat[] ca = new adat[500];
        static int db = 0;

        static int n = 2;
        static void exn(){
            Console.WriteLine($"{n++}. feladat");
        }

        static void ex1(){
            StreamReader sr = new StreamReader("autok.txt");
            while (!sr.EndOfStream){
                string[] sor = sr.ReadLine().Split(' ');
                ca[db].nap = Convert.ToInt32(sor[0]);
                ca[db].oraperc = sor[1];
                ca[db].rsz = sor[2];
                ca[db].az = Convert.ToInt32(sor[3]);
                ca[db].km = Convert.ToInt32(sor[4]);
                ca[db].kibe = Convert.ToInt32(sor[5]);
                db++;
            }
            sr.Close();
        }

        static void ex2() {
            exn();
            int index = 0;
            for (int i = 0; i < db; i++){
                if (ca[i].kibe==0){
                    index = i;
                }
            }
            Console.WriteLine($"{ca[index].nap}. nap rendszám: {ca[index].rsz}");
        }

        static void ex3() {
            exn();
            Console.Write("Nap: ");
            int nap = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine($"Forgalom a(z) {nap}. napon:");
            for (int i = 0; i < db; i++){
                if (nap==ca[i].nap){
                    Console.WriteLine(ca[i].oraperc+" "+ ca[i].rsz + " " + ca[i].az + " " + ca[i].kibe);
                }
            }
        }

        static void ex4() {
            exn();
            int sz = 0;
            for (int i = 0; i < db; i++){
                if (ca[i].kibe==0){
                    sz++;
                }
                else{
                    sz--;
                }
            }
            Console.WriteLine($"A hónap végén {sz} autót nem hoztak vissza.");
        }

        static void ex5() {
            exn();
            int v = 0, k = 0;
            for (int i = 0; i < 10; i++) {
                for (int j = 0; j < db; j++) {
                    if (ca[j].rsz == "CEG30" + i) {
                        v = ca[j].km;
                    }
                }
                for (int j = db - 1; j >= 0; j--) {
                    if (ca[j].rsz == "CEG30" + i)
                    {
                        k = ca[j].km;
                    }
                }
                Console.WriteLine($"CEG30{i} {v-k} km");
            }
        }

        static void ex6() {
            exn();
            int kezd = 0, veg = 0, max = 0;
            int[] km = new int[601];
            for (int i = 500; i < 601; i++){
                for (int j = 0; j < db; j++){
                    if (ca[j].az==i && ca[j].kibe==0){
                        kezd = ca[j].km;
                        for (int k = j; k < db; k++){
                            if (ca[k].az==i && ca[k].kibe==1){
                                veg = ca[k].km;
                                break;
                            }
                        }
                        if (km[i]<veg-kezd){
                            km[i] = veg-kezd;
                        }
                        kezd = 0;
                        veg = 0;
                    }
                }
            }
            for (int i = 0; i < km.Length; i++){
                if (km[max]<km[i]){
                    max = i;
                }
            }
            Console.WriteLine($"Leghosszabb út: {km[max]} km, személy: {max}");
        }

        static void Main(string[] args)
        {
            ex1();
            ex2();
            ex3();
            ex4();
            ex5();
            ex6();
            //ex7();
            Console.ReadKey();
        }
    }
}