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144AER.java
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144AER.java
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import java.util.*;
public class unit {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
ArrayList<Character> now;
String entry;
int indice;
while (sc.hasNext()) {
entry = sc.nextLine();
indice = 0;
now = new ArrayList<>();
for (int i = 0; i < entry.length(); i++) {
switch (entry.charAt(i)) {
case '-':
indice = 0;
break;
case '*':
indice++;
break;
case '3':
if (!now.isEmpty() && indice < now.size())
now.remove(indice);
break;
case '+':
if (now.isEmpty())
indice = 0;
else
indice = now.size();
break;
default:
if (indice > now.size()) {
if (!now.isEmpty())
indice = now.size();
else
indice = 0;
}
now.add(indice++, entry.charAt(i));
}
}
for (Character c : now)
System.out.print(c + "");
System.out.print("\n");
}
}
}