On a staircase, the i-th step has some non-negative cost cost[i] assigned (0 indexed). Once you pay the cost, you can either climb one or two steps. You need to find minimum cost to reach the top of the floor, and you can either start from the step w…

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? 题目意思: 上楼梯.假设要n步到达楼梯的顶部.每一次你只能上一个或两级台阶,问要到达顶部一共有多少种方法? 解题思路: 真是太巧了!!我…

题目 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? 分析 这个题目是一个计算n层阶梯情况下,走到顶端的路径种数(要求每次只能上1层或者2层阶梯). 这是一个动态规划的题目: n = 1 时 ways = 1: n…

这是悦乐书的第159次更新,第161篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第18题(顺位题号是70).你正在爬楼梯,它需要n步才能达到顶峰.每次你可以爬1或2步,你可以通过多少不同的方式登顶?注意:给定n是一个正整数.例如: 输入:2 输出:2 说明:有两种方法可以爬到顶端 1.1步 + 1步 2.2步 输入:3 输出:3 说明:有三种方法可以爬到顶端 1.1步 + 1步 + 1步 2.1步 + 2步 3.2步 + 1步 输入:4 输出:5 说明:有5种方法…

题目: 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? Note: Given n will be a positive integer. 题解: 爬到第n层的方法要么是从第n-1层一步上来的,要不就是从n-2层2步…

https://leetcode.com/problems/climbing-stairs/ 题目: 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? 1)递归:  超时 class Solution { public…

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? Note: Given n will be a positive integer. 对这种题目开始没有什么思路,借鉴博客http://blog.csdn.net/ken…

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? Subscribe to see which companies asked this question 简单的dp问题,代码如下: class Solution {…

问题描述: On a staircase, the i-th step has some non-negative cost cost[i]assigned (0 indexed). Once you pay the cost, you can either climb one or two steps. You need to find minimum cost to reach the top of the floor, and you can either start from the s…

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? Note: Given n will be a positive integer. Example 1: Input: 2 Output: 2 Explanation:…