算法笔记_面试题_1.爬楼梯

惊鸿一博发布时间：2020-06-22 15:17:14 ，浏览量：3

题目

一个人爬楼梯，他可以一次走1阶或者2阶，输入不同的楼梯数，求有多少种不同的走法？

问题分析

从最后到达终点那阶考虑，记为F(n)，则到达F(n)有两种情况，从F(n-1)的位置，走1阶到达; 从从F(n-2)的位置，走2阶到达。所以 F(n) = F(n-1) + F(n-2); 即是fibonacci数列的情况。

递归法

int climbStairs(int n)
{    
    if (n


    
        
        
        
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