70. Climbing Stairs Add to List

Posted 2020-08-25 Hutonm

You are climbing a stair case. It takes n steps to reach to the top.

Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the top?

 

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///////////233333333一看题有点动态规划和组合的概念

///////////斐波那契数列

 1 class Solution {
 2 public:
 3     int climbStairs(int n) {
 4         if(n<=0)
 5             return 0;
 6         int p[n];
 7         p[0]=0;
 8         p[1]=1;
 9         p[2]=2;
10         for(int i=3;i<=n;i++)
11             p[i]=p[i-1]+p[i-2];
12         return p[n];
13     }
14 };