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AlternatingCharacters.java

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import java.io.*;

import java.util.*;

import java.text.*;

import java.math.*;

import java.util.regex.*;

import java.util.ArrayList;

public class AlternatingCharacters{

static String removeCharAt(String s, int pos) {

return s.substring(0, pos) + s.substring(pos + 1);

}

public static void main(String[] args) {

Scanner s=new Scanner(System.in);

int no_of_testcase=s.nextInt();

String values="";

int removechars;

ArrayList<String> arrlist = new ArrayList<String>(no_of_testcase);

for(int i=0;i<no_of_testcase;i++)

{

values=s.next();

arrlist.add(values);

}

for(int i=0;i<arrlist.size();i++)

{

removechars=0;

for(int k=0;k<arrlist.get(i).length()-1;k++)

{

if(arrlist.get(i).charAt(k)==arrlist.get(i).charAt(k+1))

{

removeCharAt(arrlist.get(i),k+1);

removechars++;

}

System.out.println(removechars);

}