想当厨子的程序媛

题目原址 https://leetcode.com/problems/climbing-stairs/description/ 题目描述 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...

题目原址 https://leetcode.com/problems/palindromic-substrings/description/ 题目描述 Given a string, your task is to count how many palindromic substrings in this string. The substrings with different st...

题目原址 https://leetcode.com/problems/arithmetic-slices/description/ 题目描述 A sequence of number is called arithmetic if it consists of at least three elements and if the difference between any two co...