#include <iostream>
#include <stack>
#include <algorithm>
using namespace std;
int main() {
    string s;
    cin>>s;
    stack<int> st;
    for(int i=0;i<s.length();i++){
        if(s[i]=='('){
            st.push(i);
        }
        else if(s[i]==')'){
            reverse(s.begin()+st.top()+1,s.begin()+i);
            st.pop();
        }
    }
    string res;
    for(int i=0;i<s.length();i++){
        if(s[i]!='(' and s[i]!=')'){
            res+=s[i];
        }
    }
    cout<<res;
    return 0;
}

Embed on website

To embed this program on your website, copy the following code and paste it into your website's HTML: