/* 3. ´ÙÀ½ C++ ÇÁ·Î±×·¥ÀÇ Ãâ·ÂÀ» ½á¶ó. */

#include <stdio.h>
int _s[10];

class Stack {
public:
	int s[10];
	int top;
	Stack() {
		top = -1;
		init();
	}
	void push(int x) {
		top++;
		s[top] = x;
	}
	int pop() {
		top--;
		return _s[top+1];
	}
	void init() {
		for (int i = 0; i < 10; i++)
			_s[i] = 0;
	}
};

void main() 
{
	Stack stack;
	stack.push(1);
	stack.push(2);
	stack.push(3);
	stack.push(4);
	stack.push(5);
	printf("%d\n",stack.pop());
	printf("%d\n",stack.pop());
	printf("%d\n",stack.pop());
	printf("%d\n",stack.pop());
	printf("%d\n",stack.pop());
}