// https://leetcode.com/problems/clear-digits
// T: O(N)
// S: O(N)
public class ClearDigits {
public String clearDigits(String s) {
final StringBuilder builder = new StringBuilder();
for (int i = 0, chars = 0, digits = 0 ; i < s.length() ; i++) {
if (Character.isDigit(s.charAt(i))) {
builder.deleteCharAt(builder.length() - 1);
} else {
builder.append(s.charAt(i));
}
}
return builder.toString();
}
}