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 Java7 (OpenJDK 1.7.0) (judge verdict: Wrong Answer)



import java.util.*;
import java.io.*;


public class Main{
	public static void main(String args[])
	{
		Scanner sc=new Scanner(System.in);
		String s=sc.next();
		 int a=0;
		 int b=0;
		 for(int i=0;i<s.length();i++)
		 {
			 if(s.charAt(i)=='A')
			 {
				 a++;
			 }
			 else if(s.charAt(i)=='B')
			 {
				 b++;
			 }
			 
		 }
		 
		 
		 
		 
		 if(a>1||b>1&&a!=s.length()&&b!=s.length())
		 {
			 System.out.println(" Yes ");
		 }
		 else
		 {
			 System.out.println(" No ");
		 }
		
		
	}



	}