Problem:
Score : 100 points

Problem Statement

In AtCoder City, there are three stations numbered 1, 2, and 3.

Each of these stations is operated by one of the two railway companies, A and B. A string S of length 3 represents which company operates each station. If S_i is A, Company A operates Station i; if S_i is B, Company B operates Station i.

To improve the transportation condition, for each pair of a station operated by Company A and one operated by Company B, there will be a bus service connecting them.

Determine if there is a pair of stations that will be connected by a bus service.

Constraints

Each character of S is A or B.

|S| = 3

Input

Input is given from Standard Input in the following format:

S

Output

If there is a pair of stations that will be connected by a bus service, print Yes; otherwise, print No.

Sample Input 1

ABA

Sample Output 1

Yes

Company A operates Station 1 and 3, while Company B operates Station 2.

There will be a bus service between Station 1 and 2, and between Station 2 and 3, so print Yes.

Sample Input 2

BBA

Sample Output 2

Yes

Company B operates Station 1 and 2, while Company A operates Station 3.

There will be a bus service between Station 1 and 3, and between Station 2 and 3, so print Yes.

Sample Input 3

BBB

Sample Output 3

No

Company B operates all the stations. Thus, there will be no bus service, so print No.

Solution in C# (Mono 4.6.2.0) (judge verdict: Runtime Error)

using System;

namespace TaxIncrease
{
    class Program
    {
        static void Main(string[] args)
        {
            var str = Console.ReadLine().Split(' ');
            int eight = int.Parse(str[0]);
            double ten = int.Parse(str[1]);
            int kotae = -1;
            for (int i = 0; i <= 1000; i++)
            {
                if((Math.Floor(i * 0.08) == eight) && (Math.Floor(i * 0.1) == ten))
                {
                    kotae = i;
                    break;
                }
            }

            Console.WriteLine(kotae.ToString());
        }
    }
}