Submission #3417262

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Source Code Expand

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
class Program
{
    static void Main(string[] args)
    {
            // 入力
            string sS = Console.ReadLine().Trim();
            List<int> lstInp = new List<int>();
            for (int i = 0; i < sS.Length; i++)
            {
                lstInp.Add(int.Parse(sS.Substring(i, 1)));
            }

            System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
            sw.Start();

            // 解析
            string sOut = "";
            if (lstInp[0] + lstInp[1] + lstInp[2] + lstInp[3] == 7) { sOut = lstInp[0].ToString() + "+" + lstInp[1].ToString() + "+" + lstInp[2].ToString() + "+" + lstInp[3].ToString() + "=7"; }
            if (lstInp[0] + lstInp[1] + lstInp[2] - lstInp[3] == 7) { sOut = lstInp[0].ToString() + "+" + lstInp[1].ToString() + "+" + lstInp[2].ToString() + "-" + lstInp[3].ToString() + "=7"; }
            if (lstInp[0] + lstInp[1] - lstInp[2] + lstInp[3] == 7) { sOut = lstInp[0].ToString() + "+" + lstInp[1].ToString() + "-" + lstInp[2].ToString() + "+" + lstInp[3].ToString() + "=7"; }
            if (lstInp[0] + lstInp[1] - lstInp[2] - lstInp[3] == 7) { sOut = lstInp[0].ToString() + "+" + lstInp[1].ToString() + "-" + lstInp[2].ToString() + "-" + lstInp[3].ToString() + "=7"; }
            if (lstInp[0] - lstInp[1] + lstInp[2] + lstInp[3] == 7) { sOut = lstInp[0].ToString() + "-" + lstInp[1].ToString() + "+" + lstInp[2].ToString() + "+" + lstInp[3].ToString() + "=7"; }
            if (lstInp[0] - lstInp[1] + lstInp[2] - lstInp[3] == 7) { sOut = lstInp[0].ToString() + "-" + lstInp[1].ToString() + "+" + lstInp[2].ToString() + "-" + lstInp[3].ToString() + "=7"; }
            if (lstInp[0] - lstInp[1] - lstInp[2] + lstInp[3] == 7) { sOut = lstInp[0].ToString() + "-" + lstInp[1].ToString() + "-" + lstInp[2].ToString() + "+" + lstInp[3].ToString() + "=7"; }
            if (lstInp[0] - lstInp[1] - lstInp[2] - lstInp[3] == 7) { sOut = lstInp[0].ToString() + "-" + lstInp[1].ToString() + "-" + lstInp[2].ToString() + "-" + lstInp[3].ToString() + "=7"; }

            // 出力
            Console.WriteLine("{0}", sOut.ToString().Trim());

            sw.Stop();
#if DEBUG
            Console.WriteLine();
            Console.WriteLine("{0}", sw.Elapsed.ToString());
            Console.WriteLine("続行するには何かキーを押してください．．．");
            Console.ReadKey();
#endif
    }
}

Submission Info

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