Q3_2.java

import java.util.Stack;

public class Q3_2{
	public static void main(String args[]){
		StackWithMin s = new StackWithMin();
		s.push(5);
		s.push(4);
		s.push(6);
		s.push(7);
		s.push(2);
		s.push(1);
		System.out.println(s.min.size());
		s.pop();
		System.out.println(s.min());
		s.pop();
		System.out.println(s.min());
	}
	
}

class StackWithMin{
	Stack<Integer> s = new Stack<Integer>();
	Stack<Integer> min = new Stack<Integer>();
	
	void push(int value){
		s.push(value);
		if(value<min()){
			min.push(value);
		}
	}
	
	int pop(){
		if(min.peek()== s.peek())
		       min.pop();
		return   s.pop();
	}
	
	int peek(){
		return s.peek();
	}
	boolean isEmpty(){
		return s.isEmpty();
	}
	int min(){
		if(min.isEmpty())
		     return Integer.MAX_VALUE;
		else return min.peek();
	}
	
	
}