#include <iostream>
#include <stack> // Required for using the stack container
using namespace std;
 
int main() {
    // 1. Initialize an empty stack of integers
    stack<int> s;
 
    // Push elements: 10, 20, 30
    s.push(10);
    s.push(20);
    s.push(30);
 
    // Current State Check
    cout << "Initial Stack Size: " << s.size() << endl; // Output: 3
    cout << "Initial Top Element: " << s.top() << endl; // Output: 30
 
    // pop(): Removes the top element (30) from the stack.
    s.pop();
 
    // State Check After Pop
    cout << "New Stack Size: " << s.size() << endl; // Output: 2
    cout << "New Top Element: " << s.top() << endl; // Output: 20
 
    // empty(): Checks if the stack has any elements.
    cout << s.empty() << endl; // Output: 0(which means false)
 
    return 0;
}

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