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53 lines
1.0 KiB
C++
53 lines
1.0 KiB
C++
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#include <iostream>
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#include <stack>
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using std::cin;
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using std::cout;
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const char endl = '\n';
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int main() {
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std::ios::sync_with_stdio(false);
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cin.tie(nullptr);
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int t;
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cin >> t;
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while (t--) {
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int n;
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std::stack<unsigned long long> st;
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cin >> n;
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while (n--) {
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std::string op;
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cin >> op;
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if (op == "push") {
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unsigned long long x;
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cin >> x;
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st.emplace(x);
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} else if (op == "pop") {
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if (st.empty()) {
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cout << "Empty" << endl;
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} else {
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st.pop();
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}
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} else if (op == "query") {
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if (st.empty()) {
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cout << "Anguei!" << endl;
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} else {
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cout << st.top() << endl;
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}
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} else if (op == "size") {
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cout << st.size() << endl;
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}
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}
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}
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return 0;
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}
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