901. 股票价格跨度(递减栈）

class StockSpanner {
public:
    StockSpanner() {

    }
    int next(int price) {
        int d=1;
        while(!value.empty()&&price>=value.top())//价格栈不为空且当前的价格大于等于价格栈的顶元素
        {
            d+=get.top();//当前跨度为1加上跨度顶的元素
            value.pop();
            get.pop();//每个栈删去栈顶元素
        }
        value.push(price);//每次存价格进去
        get.push(d);//把对应的跨度存进去
        return d;
    }
    private:
        stack<int>value;
        stack<int>get;
};

/**
 * Your StockSpanner object will be instantiated and called as such:
 * StockSpanner* obj = new StockSpanner();
 * int param_1 = obj->next(price);
 */