#include<bits/stdc++.h>
using namespace std;
bool bracketMatch(string s)
{
    stack<char>st;
    for(char x : s)
    {
        if(x=='('||x=='['||x=='{')
            st.push(x);
        else
        {
            if(st.empty())return false;
            char a=st.top();
            st.pop();
            if((x==')'&&a!='(')||
               (x==']'&&a!='[')||
               (x=='}'&&a!='{'))
               return false;
        }
    }
    return st.empty();
}
int main()
{
    string s1 = "((()))";
    string s2 = "([{{}])";

    if(bracketMatch(s1))
        cout << "s1 matched" << endl;
    else
        cout << "s1 not matched" << endl;

    if(bracketMatch(s2))
        cout << "s2 matched" << endl;
    else
        cout << "s2 not matched" << endl;

    return 0;
}