没什么好说的，，是左括号进栈，右括号判断，就是容易出错注意细节

#include <iostream>
#include <vector>
#include <cstdio> 
#include <stack>
using namespace std;
int n;
stack<char> s;
vector<char> vec;
char sign;

int main()
{
	cin>>n;
	getchar();//排除输入n的回车对后续输入的干扰 
	while(n--){
		int flag = 1;
		while((sign=cin.get())!='\n'){
			vec.push_back(sign);
		}
		
		for(int i=0;i<vec.size();i++){
			if(vec[i]=='('||vec[i]=='['){
				s.push(vec[i]);
				continue;
			}
			if(s.empty()){
				flag=0;
				break;
			}
		
			char stop = s.top();
			if(stop=='('&&vec[i]==')'||stop=='['&&vec[i]==']'){
				s.pop();
			}	
			else {
				flag = 0;
				break;
			}			
		}
		
		if(flag==1&&s.empty())cout<<"Yes"<<endl;
		else cout<<"No"<<endl;
		
		while(!s.empty())
		s.pop();
		
		vec.clear();
		
		
	}
	
	return 0;
}