90pst求调必关

#include<iostream>
#include<stack>
using namespace std;
int t,n;
unsigned long long int x;
string s;
stack<unsigned long long int> awa;
int main() {
	ios::sync_with_stdio(0);
	cin.tie(nullptr),cout.tie(nullptr);
	cin>>t;
	while(t--) {
		cin>>n;
		while(n--) {
			cin>>s;
			if(s=="push")cin>>x,awa.push(x);
			else if(s=="pop") {
				if(!awa.empty())awa.pop();
				else cout<<"Empty"<<'\n';
			} else if(s=="query") {
				if(!awa.empty())cout<<awa.top()<<'\n';
				else cout<<"Anguei!"<<'\n';
			} else cout<<awa.size()<<'\n';
		}
	}
	return 0;
}