Submission #405799

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Source Code Expand

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

namespace AtCoder
{
    class Program
    {
        static void Main(string[] args)
        {
            var AB = Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray();
            var ss = new Solver(AB);
                Console.WriteLine(ss.solve());
            

        }
    }

    class Solver
    {
        int[] AB;
        public Solver(int[] AB)
        {
            this.AB=AB;
        }
        public int solve()
        {
            var A = AB[0]; var B = AB[1];
            return Math.Max(Maxize(A) - B, A - Minize(B));         
        }

        private int Minize(int N)
        {
            var newN = N.ToString().ToCharArray();
            if (newN[0] == 1)
            {
                if (newN[1] == 0)
                {
                    newN[2] = '0';
                    return int.Parse(new string(newN));
                }
                else
                {
                    newN[1] = '0';
                    return int.Parse(new string(newN));
                }
            }
            else
            {
                newN[0] = '1';
                return int.Parse(new string(newN));
            }
        }

        private static int Maxize(int N)
        {
            var newN = N.ToString().ToCharArray();
            if(newN[0]==9)
            {
                if(newN[1]==9)
                {
                    newN[2] = '9';
                    return int.Parse(new string(newN));
                }
                else
                {
                    newN[1] = '9';
                    return int.Parse(new string(newN));
                }
            }
            else
            {
                newN[0] = '9';
                return int.Parse(new string(newN));
            }
        }
    }
}

Submission Info

Judge Result