https://oj.leetcode.com/problems/climbing-stairs/
http://blog.csdn.net/linhuanmars/article/details/23976963
public class Solution { public int climbStairs(int n) { // A recursive solution // if (n == 1 || n == 2) // { // return 1; // } // return climbStairs(n - 1) + climbStairs(n - 2); int[] solutions = new int[Math.max(n, 2)]; solutions[0] = 1; solutions[1] = 2; for (int i = 2 ; i < solutions.length ; i ++) { solutions[i] = solutions[i - 1] + solutions[i - 2]; } return solutions[n - 1]; } }
原文:http://7371901.blog.51cto.com/7361901/1598899