题解 | 数位差与数值和的构造

using System;

class Program
{
    static void Main()
    {
        // 读取测试用例数量
        int T = int.Parse(Console.ReadLine());
        
        for (int i = 0; i < T; i++)
        {
            string nStr = Console.ReadLine().Trim();
            long x = 0, y = 0;
            bool turn = true;

            foreach (char c in nStr)
            {
                int digit = c - '0';
                int half = digit / 2;
                int rem = digit % 2;

                if (rem == 0)
                {
                    x = x * 10 + half;
                    y = y * 10 + half;
                }
                else
                {
                    if (turn)
                    {
                        x = x * 10 + half + 1;
                        y = y * 10 + half;
                    }
                    else
                    {
                        x = x * 10 + half;
                        y = y * 10 + half + 1;
                    }
                    turn = !turn;
                }
            }
            Console.WriteLine($"{x} {y}");
        }
    }
}