#include <iostream>
#include <stack>
int main() {
std::stack<int> myStack;
// Pushing elements onto the stack
myStack.push(10);
myStack.push(20);
myStack.push(30);
// Displaying the top element of the stack
std::cout << "Top element: " << myStack.top() << std::endl;
// Popping the top element
myStack.pop();
// Checking if the stack is empty
if (myStack.empty()) {
std::cout << "Stack is empty." << std::endl;
} else {
std::cout << "Stack is not empty." << std::endl;
}
// Displaying the size of the stack
std::cout << "Size of stack: " << myStack.size() << std::endl;
return 0;
}