[Init] Solved solutions

cs/518A.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace _518A
+{
+	class Program
+	{
+		static void Main(string[] args)
+		{
+			string c1 = Console.ReadLine();
+			string c2 = Console.ReadLine();
+			StringBuilder s1 = new StringBuilder(c1);
+			StringBuilder s2 = new StringBuilder(c2);
+			bool b;
+			if (s1.ToString() == s2.ToString())
+			{
+				b = false;
+			}
+			else
+			{
+				int j = s1.Length - 1;
+				for (; j >= 0; j--)
+				{
+					if (s1[j] == 'z')
+					{
+						s1[j] = 'a';
+					}
+					else
+					{
+						s1[j] = Convert.ToChar(s1[j] + 1);
+						break;
+					}
+				}
+				if (j == -1 || s1.ToString() == s2.ToString())
+				{
+					b = false;
+				}
+				else
+				{
+					b = true;
+				}
+			}
+			if (b)
+			{
+				Console.WriteLine(s1);
+			}
+			else
+			{
+				Console.WriteLine("No such string");
+			}
+		}
+	}
+}