牛客网-《剑指offer》-跳台阶

题目：http://www.nowcoder.com/practice/8c82a5b80378478f9484d87d1c5f12a4

C++

class Solution {
public:
    int jumpFloor(int n) {
        if (n == 1 || n == 2) return n;
        return jumpFloor(n - 1) + jumpFloor(n - 2);
    }
};