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package torea;
// import java.util.Stack;
import java.lang.StringBuilder;
public class Backspace{
public static void main(String[] args)
{
Kattio sc = new Kattio(System.in, System.out);
String input = sc.getWord();
String output = removeBackspaceAlt(input);
sc.println(output);
sc.close();
}
public static String removeBackspace(String phrase){
int nrToErase = 0;
StringBuilder res = new StringBuilder();
for(int i = phrase.length()-1; i >= 0; i--){
Character c = phrase.charAt(i);
if (c == '<'){
nrToErase++;
}
else {
if (nrToErase > 0){
nrToErase--;
continue;
}
else {
// chrStack.push(c);
res.append(c);
}
}
}
return res.reverse().toString();
}
public static String removeBackspaceAlt(String phrase){
StringBuilder res = new StringBuilder("");
for(int i = 0; i < phrase.length(); i++){
Character c = phrase.charAt(i);
if (c == '<'){
res.setLength(res.length()-1);
}
else {
res.append(c);
}
}
return res.toString();
}
} |