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34 | import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String s = sc.nextLine();
Stack<Character> stack = new Stack<>();
int result=0;
for(int i=0; i<s.length(); i++) {
if(s.charAt(i)=='(') {
stack.push('(');
}
else if(s.charAt(i)==')') {
if(s.charAt(i-1)=='(') {
stack.pop();
result += stack.size();
}
else {
stack.pop();
result+=1;
}
}
}
System.out.println(result);
}
} |
