import java.util.Stack;

public class MinStack {

    private int min;
    private Stack<Integer> stack;

    /** initialize your data structure here. */
    public MinStack() {

        min = Integer.MAX_VALUE;
        stack = new Stack<Integer>();

    }

    public void push(int x) {

        if (x <= min) {
            stack.push(min);
            min = x;
        }

        stack.push(x);

    }

    public void pop() {

        if (stack.pop() == min) {
            min = stack.pop();
        }

    }

    public int top() {
        return stack.peek();
    }

    public int getMin() {
        return min;
    }

}

/**
 * Your MinStack object will be instantiated and called as such:
 * MinStack obj = new MinStack();
 * obj.push(x);
 * obj.pop();
 * int param_3 = obj.top();
 * int param_4 = obj.getMin();
 */

Create : 155 Min Stack
Create : 155 Min Stack
