using System;
using System.Collections.Generic;
using System.Linq;

namespace Lab01Disc
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> Universal = new List<int>() { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
            List<int> A = new List<int>() { 1, 2, 3, 4, 5, 6, 7 };
            List<int> B = new List<int>() { 5, 6, 7, 8, 9, 10 };
            List<int> C = new List<int>() { 1, 2, 3, 8, 9, 10 };
            List<int> AC;
            List<int> ACB;
            AC = A.Intersect(C).ToList();
            ACB = AC.Union(B).ToList();
            var amount3 = Universal.Count - 1;
            Console.Write("Даны множества:\nU = {");
            foreach (int i in Universal)
            {
                if (amount3 != Universal.IndexOf(i))
                {
                    Console.Write($"{i}, ");
                }
                else
                {
                    Console.Write(i + "}");
                }
            }
            var amount4 = A.Count - 1;
            Console.WriteLine();
            Console.Write("A = {");
            foreach (int i in A)
            {
                if (amount4 != A.IndexOf(i))
                {
                    Console.Write($"{i}, ");
                }
                else
                {
                    Console.Write(i + "}");
                }
            }
            var amount5 = B.Count - 1;
            Console.WriteLine();
            Console.Write("B = {");
            foreach (int i in B)
            {
                if (amount5 != B.IndexOf(i))
                {
                    Console.Write($"{i}, ");
                }
                else
                {
                    Console.Write(i + "}");
                }
            }
            var amount6 = C.Count - 1;
            Console.WriteLine();
            Console.Write("C = {");
            foreach (int i in C)
            {
                if (amount6 != C.IndexOf(i))
                {
                    Console.Write($"{i}, ");
                }
                else
                {
                    Console.Write(i + "}");
                }
            }
            Console.WriteLine();
            Console.WriteLine("Первое выражение: ");
            Console.Write("(A ∩ C) ∪ B = {");
            var amount1 = ACB.Count - 1;
            foreach (int i in ACB)
            {
                if (amount1 != ACB.IndexOf(i)){
                    Console.Write($"{i}, ");
                }
                else{
                    Console.Write(i + "}");
                }
            }
            Console.WriteLine();
            int[] arrB = { 5, 6, 7, 8, 9, 10 };
            int[] arrC = { 1, 2, 3, 8, 9, 10 };
            List<int> BC = new List<int>();
            for (int i = 0; i < arrB.Length; i++){
                if(arrB[i] != arrC[i] && arrC[i] != arrB[i]){
                    BC.Add(arrB[i]);
                    BC.Add(arrC[i]);
                }
            }
            BC.Sort();
            var amount2 = BC.Count - 1;
            Console.WriteLine("Выражение выражение: ");
            Console.Write("B ∆ C = {");
            foreach (int i in BC){
                if (amount2 != BC.IndexOf(i))
                {
                    Console.Write($"{i}, ");
                }
                else
                {
                    Console.Write(i + "}");
                }
            }
            Console.ReadKey();
        }
    }
}