2 test cases not passing how to fix it?

#1
#2

hello @akash_281
check now->

#include<iostream>
using namespace std;
#include<stack>

bool balance(string s)
{
	stack<char> s1;
	for(int i=0;s[i]!='\0';i++)
	{
		if(s[i]=='(')
		{
			s1.push(s[i]);
		}
		if(s[i]==')')
		{  if(s1.empty()){  // added: if stack is empty then return false
              return false;
            }
			if(s1.top()=='(')
			{
				s1.pop();
			}
		}
	}
	if(s1.empty())
	{
		return true;
	}
    return false;
}
int main()
{
	string s;
	cin>>s;
	balance(s);
	if(balance)
	{
		cout<<"Yes";
	}
	else
	{
		cout<<"No";
	}
	return 0;
}
#3

Still not passing all the test cases

#4

@akash_281
image

in input we can have other brackets as well( u r handling only for () ).

check this for refrence->