class MinStack {
public:
    /** initialize your data structure here. */

    stack <int> min_num , nums;
    MinStack() {
        stack <int> temp ;
        min_num = temp;
        nums = temp;
    }

    void push(int x) {
        nums.push(x);
        if (min_num.empty())
        {
            min_num.push(x);
        }
        else
        {
            min_num.push(min (x,min_num.top()));
        }

    }

    void pop() {
        min_num.pop();
        nums.pop();

    }

    int top() {
        return nums.top();
    }

    int getMin() {
        return min_num.top();
    }
};

/**
 * 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();
 */