题解 | 跳台阶

class Solution 
{
public:
    int jumpFloor(int number) 
    {
        int a = 1, b = 1, c;
        for(int i = 2; i <= number; i++)
        {
            c = a + b;
            a = b;
            b = c;
        }

        if(number == 0 || number == 1) return number;
        return c;
    }
};

使用三个变量优化一下动态规划!!!