题解 | #小乐乐改数字#

using System;
using System.Linq;
public class Program {
    public static void Main() {
        int num = int.Parse(Console.ReadLine());
        string str = "";

        do
        {
            int i = num%10;
            if((i%2)==1)
            {
                i = 1;
            }
            else
            {
                i = 0;
            }
            str += i.ToString();
        }
        while((num=num/10) != 0);

        string s = new string(str.Reverse().ToArray());

        System.Console.WriteLine(int.Parse(s));
    }
}