称号: 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? 非常easy的思路.由于一次能够走1~2步,所以到达第n级能够从第n-1级,也能够从第n-2级. 设到达第n级的方法有s(n)种,s(n)=s(n-1)+s(n…

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? 这个爬梯子问题最开始看的时候没搞懂是让干啥的,后来看了别人的分析后,才知道实际上跟斐波那契数列非常相似,假设梯子有n层,那么如何爬到第n层呢,因为每次只能怕1或2步,那…

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? Have you met this question in a real interview? Yes Example Given an example n=3 , 1…

July 28, 2015 Problem statement: 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? The problem is most popular question in the algorit…

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? Example Given an example n=3 , 1+1+1=2+1=1+2=3 return 3 For the problem, try to thin…

Search a 2D Matrix Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties: Integers in each row are sorted from left to right. The first integer of each row is greater than the last integer…

Climbing Stairs https://leetcode.com/problems/climbing-stairs/ 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? 算法描述 (1)这道题其实是一道fibon…

原题 Climbing Stairs 求斐波那契数列的第N项,开始想用通项公式求解,其实一个O(n)就搞定了. class Solution { public: int climbStairs(int n) { ) ; ; ; ; i<n; ++i) { int t = n2; n2 = n1 + n2; n1 = t; } return n2; } }; 还是觉得没有ACM难度,继续做吧.…

1- 问题描述 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? 2- 思路分析 很自然的会想到递归,假设 n 级台阶有 T(n) 种不同走法.最后一步存在两种情况:剩下 1 级台阶,或者,剩下 2 级台阶. 第一种情…

Climbing Stairs  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? 思路:题目也比較简单.类似斐波那契. 代码例如以下: public class Solution { public int climb…