小强刷题~

You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb

Compute and return the square root of x, where x is guaranteed to be a non-negative integer. Since t

Given two binary strings, return their sum (also a binary string). The input strings are both non-em

Given a non-empty array of digits representing a non-negative integer, plus one to the integer.

Given a string s consists of upper/lower-case alphabets and empty space characters '

Given an integer array nums, find the contiguous subarray (containing at least one number) which has

The count-and-say sequence is the sequence of integers with the first five terms as following:

Given a sorted array and a target value, return the index if the target is found. If not, return the

Implement strStr(). Return the index of the first occurrence of needle in haystack, or -1 if needle

Given an array nums and a value val, remove all instances of that value in-place and return the new

Given a sorted array nums, remove the duplicates in-place such that each element appear only once an

Merge two sorted linked lists and return it as a new list. The new list should be made by splicing t

Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the in

Write a function to find the longest common prefix string amongst an array of strings. If there is n

Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M.

Given an integer x, return true if x is palindrome integer. An integer is a palindrome when it reads

7. Reverse IntegerGiven a 32-bit signed integer, reverse digits of an integer.

Given an array of integers, return indices of the two numbers such that they add up to a specific ta