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import java.util.*;
public class Parenthesis{
static boolean isPara(String s){
Deque<Character> st = new ArrayDeque<Character>();
for(int i=0; i<s.length(); i++){
char x = s.charAt(i);
if(x=='(' || x=='{' || x=='['){
st.push(x);
continue;
}
if(st.isEmpty()){
return false;
}
char ch;
switch(x){
case ')':
ch = st.pop();
if(ch=='{' || ch == '[')
return false;
break;
case '}':
ch = st.pop();
if(ch=='(' || ch=='[')
return false;
break;
case ']':
ch = st.pop();
if(ch=='(' || ch=='{')
return false;
break;
}
}
return (st.isEmpty());
}
public static void main(String[] args){
String s = "{{ad(ad)}}";
System.out.println(isPara(s));
}
}
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