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;
 
class Test{
 public static void Main(){
   var str = Console.ReadLine().Split(' ');
   double tax8  = double.Parse(str[0]);
   double tax10 = double.Parse(str[1]);
   
   double val8 = Math.Ceiling(tax8 / 0.08);
   double val10 = Math.Ceiling(tax10 / 0.1);
   if(val8 >= val10){
     if(Math.Floor(val8*0.1) == tax10){
       Console.WriteLine(val8);
     }else{
       Console.WriteLine(-1);
     }
   }else{
     if(Math.Floor(val10*0.08) == tax8){
       Console.WriteLine(val10);
     }else{
       Console.WriteLine(-1);
     }
   }
 }
}