#include<iostream>

#include<cstring>

#include<cstdlib>

#include<queue>

using namespace std;

const int M=;

char a[M];

bool match()

{

    queue<char> q;

    int i=;

    while(a[i]!='\0')

    {

        if(a[i]=='(')

        {

            q.push(a[i]);

        }

        if(a[i]==')')

        {

            if(q.empty())

                return false;

            else

                q.pop();

        }

        i++;

    }

    if(!q.empty())

        return false;

    else

        return true;

}

int main()

{

    memset(a,'\0',sizeof(a));

    while(scanf("%s",a))

    {

        if(match())

            cout<<<<endl;

        else

            cout<<<<endl;

        memset(a,'\0',sizeof(a));

    }

    return ;

}