package practice1;

public class shashank {

public static String changeSlashes(String original)

{

StringBuilder sb= new StringBuilder();

for(int i=0;i<original.length();i++)

{

if(original.charAt(i)=='/')

{

sb.append('\\');

sb.append('\\');

}

else

{

sb.append(original.charAt(i));

}

}

String answer= new String(sb);

return answer;

}

public static String changeSlashesOptimized(String original)

{

int countForSlash=0,newlength,i,j;

for(i=0;i<original.length();i++)

{

if(original.charAt(i)=='/') ++countForSlash;

}

newlength=original.length()+countForSlash;

char[] ansArr= new char[newlength];i=0;

for(j=0;j<newlength;++j)

{

if(original.charAt(i)=='/')

{

ansArr[j++]='\\';

ansArr[j]='\\';

}

else

{

ansArr[j]=original.charAt(i);

}

if(i<original.length()-1) ++i;

}

String answer=new String(ansArr);

return answer;

}

public static void main(String[] args)

{

String s="C:/temp/nit/bit/ranchi";

System.out.println(changeSlashes(s));

System.out.println(changeSlashesOptimized(s));

}

}