# Leetcode String Problems

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`	Keyboard Row [LeetCode] 502. Solution (two pointers). Input is guaranteed to be within the range from 1 to 3999. ) Return any duplicated substring that has the longest possible length. A very important tool to have in our arsenal is backtracking, it is all about knowing when to stop and step back to explore other possible solutions. Watch Queue Queue. How to solve coding interview problems ("Let's leetcode") TechLead. Strings consists of lowercase English letters only and the length of both strings s and p will not be larger than 20,100. If two such substrings overlap, you need to wrap them together by only one pair of closed bold tag. Return all such possible sentences. Also it's not a company specific stuff, it's just the engineers in that company who want to check how you will approach a problem, can you come up with different approaches, can you discuss the tradeoffs  with some standard problem. string;  Given a string S and a string T , count the number of distinct subsequences of T in S. When in the future comparison, if we find that the comparison have been done before and we don't need to do it again and just use the results directly. So the key here is this. Hint: Carefully consider all possible input cases. The input can be an array, string, matrix, tree, linked list, graph, etc. 	String always consists of two distinct alternating characters. leetcode problems | leetcode problems. I also want to thank the following two. This is an n**2 solution. The encoding rule is: k[encoded_string], where the encoded_string inside the square brackets is being repeated exactly k times. Given that Len(S)<=12, a simple recursive solution will do it. Freedom Trail [LeetCode] 533. My blog for LeetCode Questions and Answers leetcode Questions: Reverse Words in a String  are not many c++ oriented solutions for such problems out there. com/ Author: peking2. LeetCode problem 567 Permutation in String (Java) May 15, 2019 May 15, 2019 tinyfool LeetCode. Given an array of integers, return indices of the two numbers such that they add up to a specific target. So the complexity of your code has increased n-times. Then, for every p < q in the list, we consider the fraction p/q. Solution (two pointers). You have to paint all the houses such that no two adjacent houses have the same color. If the first sequence of non-whitespace characters in str is not a valid integral number, or if no such sequence exists because either str is empty or it contains only whitespace. The expression string contains only non-negative integers, +, -, *, / operators and empty spaces. For example, given. Note: You may assume all letters are in lowercase. We are given a stack data structure with push and pop operations, the task is to implement a queue using instances of stack data structure and operations on them. 		(The occurrences may overlap. LeetCode Problems' Solutions. Problem: Given an input string, reverse the string word by word. For 1), I choose to scan char by char, once I found a space, the scanned chars form a word; For 2), there may be a couple of choices, you could start construct a new string - let's say s1, concatenate the new word with s1 each time you found a word. Leetcode: Implement strStr() (4ms) Implement strStr(). Here is the classification of all 173 problems. These are problems that often deal with strings like permutations, backtracking problems that have use take an exhaustive approach in producing decompositions of a string to search a possibility space (which is often a brute force way of solving a problem since it will be exponential in time), etc etc. [Leetcode] DP problems. Then, starting from this character, takes an optional initial plus or minus sign followed by as many numerical digits as possible, and interprets them as a numerical value. This problem is also useful for solving real problems. [LeetCode] Sort Colors Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Strings consists of lowercase English letters only and the length of both strings s and p will not be larger than 20,100. A word is defined as a sequence of non-space characters. That is exactly the reason at Line 16, we wanna check if the string is not empty, because we don't allow leading spaces in the reversed string. Hackerank Strengths * Tons, and I mean tons, of questions and organized into Tracks. Zuma Game 260. Given a string S, consider all duplicated substrings: (contiguous) substrings of S that occur 2 or more times. 	I used to solve a lot of problems on LeetCode, and it'd take me multiple hours to solve "hards" on there. Return all such possible sentences. LeetCode OJ - Maximum XOR of Two Numbers in an Arr LeetCode OJ - Minimum Moves to Equal Array Element LeetCode OJ - Partition Equal Subset Sum LeetCode OJ - Convert Sorted List to Binary Search LeetCode OJ - Recover Binary Search Tree LeetCode OJ - Decode String LeetCode OJ - Arranging Coins. You may assume that each input would have exactly one solution. CheatSheet: Leetcode For Code Interview Tag: #array Given a 2D grid of 0s and 1s, return the number of elements in the largest square subgrid that has all 1s on its border, or 0 if such a subgrid doesn’t exist in the grid. The input string does not contain leading or trailing spaces and the words are always separated by a single space. Note: This post listed the questions in the same order of leetcode website. In other words, one of the first string's permutations is the substring of the second string. Notes: INT_MAX's fabs is one less than INT_MIN's fabs. The encoded string is then sent over the network and is decoded back to the original list of strings. com/problems/reverse-string/#/description. Up to date (2014-12-31), there are total 173 problems on LeetCode Online Judge. This video is unavailable. Leetcode: Word Break II Given a string s and a dictionary of words dict , add spaces in s to construct a sentence where each word is a valid dictionary word. The string "PAYPALISHIRING" is written in a zigzag pattern. [Leetcode] Pacific Atlantic Water Flow Given an m x n matrix of non-negative integers representing the height of each unit cell in a continent, the "Pacific ocean" touches the left and top edges of the matrix and the "Atlantic ocean" touches the right and bottom edges. Given two strings s1 and s2 of the same length, determine if s2 is a scrambled string of s1. 		I wonder if there is something about the site LeetCode that I should know like a config setting somewhere, or  Regardless the problem asks to find the longest palindrome in a string. Level up your coding skills and quickly land a job. Therefore, we will use the second method. I usually use the same recipe for such a problem: I usually prefer to have an internal method which does the actual processing, doesn't return anything, and passes the "return value" by reference; There is a string which is the "current" working string. Subscribe to see which companies asked this question. Like Perl, Python source code is also available under the GNU General Public License (GPL). You have solved 0 / 143 problems. Woodstock Blog - okc1. Leetcode Questions. Leetcode Pattern 1 | BFS + DFS == 25% of the problems — part 1 It is amazing how many graph, tree and string problems simply boil down to a DFS (Depth-first search) / BFS (Breadth-first search). Using hash table: map OR unordered_map. Longest Palindromic Substring Given a string S, find the longest palindromic substring in S. Solving Tree Problems on LeetCode. This question is not so related with the LeetCode problemm itself. Solve String Problems on LeetCode. Given a string that consists of only uppercase English letters, you can replace any letter in the string with another letter at most k times. [Leetcode] Pacific Atlantic Water Flow Given an m x n matrix of non-negative integers representing the height of each unit cell in a continent, the "Pacific ocean" touches the left and top edges of the matrix and the "Atlantic ocean" touches the right and bottom edges. 	That is exactly the reason at Line 16, we wanna check if the string is not empty, because we don't allow leading spaces in the reversed string. In this solution, we just use '#'. (a connected component (or just component) of an undirected graph is a subgraph in which any two vertices are connected to each other by paths, and which. com/book/ Besides, there are many free. Decode String. This problem is also useful for solving real problems. Lonely Pixel II February ( 12 ). You are responsible to. Hint: Carefully consider all possible input cases. Find the length of a longest substring containing all repeating letters you can get after performing the above operations. Leetcode Medium Longest Palindromic Substring Java. Single Number III 240. Because '*' is matching any sequence and do not have to consider the preceding char. You are more than welcome to post your solutions in the comments if you think yours are better. LeetCode - Two Sum Problem Solution. We use cookies for various purposes including analytics. DA: 56 PA: 24 MOZ Rank: 46. Part II focuses on graph- and string-processing algorithms. 		You are responsible to gather all. com/problems. Leetcode: String to Integer (atoi) in C++  It is intended for this problem to be specified vaguely (ie, no given input specs). Contribute to olzhy/leetcode development by creating an account on GitHub. We can copy codes from problem 76 only change serval lines. Given two strings s1 and s2, write a function to return true if s2 contains the permutation of s1. Java, C, C++, C#, Python, Ruby and even JavaScript. Solution Explanation Understanding the question here is very simple, given a string RENTNOW, the substring NTN is a palindrome of length 3, and. g, Google, Facebook, Amazon, etc. LeetCode is pretty good about the asymptotical memory usage and performance expectations for passing solutions. 求和问题2sum, 3sum, k sum 1. March 5, 2016 Problem statement: Bear and steady gene A gene is represented as a string of length n (where n is divis White board practice May 13, 2018 Introduction I did some mock interview with my roommate Emma, she gave me a free lesson how to give a good presentation. Solutions for CTCI book and Leetcode problem. Stay tuned for updates. Reverse Words in a String Leetcode. Java Solution 1. 	Quicksort is a fast sorting algorithm, which is used not only for educational purposes, but widely applied in practice. Rearrange String k Distance Apart  Solve Leetcode Problems. For example, if string 's two distinct characters are xand y, then t could be xyxyx or yxyxy but notxxyy or xyyx. Part of this great node. 3: these test cases are semi-automatically :P retrieved from LeetCode Online Judge system and are kept in JSON format 4: each Xcode project includes everything (my Swift solution to a problem, its JSON test cases and a driver code to test the solution on those test cases). com/book/ Besides, there are many free. [LeetCode] String to Integer (atoi) Problem Statement : Implement atoi to convert a string to an integer. Given a string s and a non-empty string p, find all the start indices of p's anagrams in s. This question came from a little simple problem from LeetCode. If *s1 == 0, are all the characters in s2 == 0?. Similar to the problem of "Excel Sheet Column Number", we want to represent a number with 26 as base. LeetCode OJ - Maximum XOR of Two Numbers in an Arr LeetCode OJ - Minimum Moves to Equal Array Element LeetCode OJ - Partition Equal Subset Sum LeetCode OJ - Convert Sorted List to Binary Search LeetCode OJ - Recover Binary Search Tree LeetCode OJ - Decode String LeetCode OJ - Arranging Coins. [Leetcode] Pacific Atlantic Water Flow Given an m x n matrix of non-negative integers representing the height of each unit cell in a continent, the "Pacific ocean" touches the left and top edges of the matrix and the "Atlantic ocean" touches the right and bottom edges. What is the intuition behind the recursive formulation? And, why the below code doesn't work. For the method insert, you’ll be given a. com problems. Leetcode: Sliding Puzzle: 3: Split string by multiple seperator: Leetcode: Brace Expansion: 4: Add a dummy tailing element to simplify code: Leetcode: Brace Expansion: 5: Fast slow pointers: LintCode: Middle of Linked List: 6: Deep copy an array: Leetcode: Combination Sum: 7: Use arrays instead of hashmaps, if possible: Leetcode: Number of Days. 		3: these test cases are semi-automatically :P retrieved from LeetCode Online Judge system and are kept in JSON format 4: each Xcode project includes everything (my Swift solution to a problem, its JSON test cases and a driver code to test the solution on those test cases). I also want to thank the following two. If you want a challenge, please do not see below and ask yourself what are the possible input cases. That is, identifier is not replaced if it appears in a comment, in a string, or as part of a longer identifier. You may assume that the maximum length of S is 1000, and there exists one unique longest palindromic substring. Leetcode: Word Break  but the idea of comparing dictionary word with the string is quite commonly used in many sub-string problems. When in the future comparison, if we find that the comparison have been done before and we don't need to do it again and just use the results directly. Note: The input string may contain letters other than the parentheses ( and ). Since lowercase alphabetic characters have exactly 26 different characters, it takes O(26 * m) time to traverse all possible changes for a given string. Returns true if the stack is empty. , are serviced) from the front of the line. A word is defined as a sequence of non-space characters. Quicksort is a fast sorting algorithm, which is used not only for educational purposes, but widely applied in practice. Hint: Carefully consider all possible input cases. This problem is not difficult but should pay more attention for the corner cases. My blog for LeetCode Questions and Answers leetcode Questions: Reverse Words in a String  are not many c++ oriented solutions for such problems out there. For 1), I choose to scan char by char, once I found a space, the scanned chars form a word; For 2), there may be a couple of choices, you could start construct a new string - let's say s1, concatenate the new word with s1 each time you found a word. Contiguous Array [leetcode] 322. Arrays are also expensive to maintain new insertions and deletions. 	By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. The naive implementation is splitting the string into halves at different points in the string and then checking if the halves are scrambled, a recursive approach. String to Integer. Watch Queue Queue. The more commonly used stacks and queues are degenerate forms of deques, where the inputs and outputs are restricted to a single end. soulmachine/leetcode - 含C++和Java. 求和问题2sum, 3sum, k sum 1. I revisited all the questions again and also have modified/updated analysis and code for many of them. You may assume that if a is a prefix of b, then a must appear before b in the given dictionary. Excel Sheet Column Number LeetCode 326. Return all possible palindrome partitioning of s. Letter Combinations of a Phone Number. A fellow redditor from /r/cscareerquestions pointed me to this awesome thread on leetcode discuss which reveals the sliding window pattern for solving multiple string (substring) problems. I will try to put up solutions for the problems in leetcode as I believe this will be helpful for fellow software engineers and also for me to try to learn how to solve these problems by explaining how they work. Add Digits LeetCode 171. This problem is familiar with problem 76. Paths for aadbbcbcac, from top-left ot bottom-right. 		golang solutions for leetcode algorithm problems. You have to paint all the houses such that no two adjacent houses have the same color. Stay tuned for updates. I will try to put up solutions for the problems in leetcode as I believe this will be helpful for fellow software engineers and also for me to try to learn how to solve these problems by explaining how they work. Thus, we want to check any two siblings that if they are swapped. 01 Matrix [LeetCode] 536. I used Interview Cake as my primary review material, and I know that it was a huge factor in my success. from 1,1 goto 1,2 use letter a in aabcc. LeetCode OJ - Maximum XOR of Two Numbers in an Arr LeetCode OJ - Minimum Moves to Equal Array Element LeetCode OJ - Partition Equal Subset Sum LeetCode OJ - Convert Sorted List to Binary Search LeetCode OJ - Recover Binary Search Tree LeetCode OJ - Decode String LeetCode OJ - Arranging Coins. Reverse Pairs [LeetCode] 498. leetcode algorithm java interview mysql bash apache data-structures leetcode-solutions leetcode-questions leetcode-java leetcoder 2,636 commits. 99 Problems in OCaml contains Ocaml solutions to many problems. Since we don't need the orders in the map, we can use unordered_map to speed up the process. Join over 5 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. If string s1 and s2 are scramble strings, there must be a point that breaks s1 to two parts s11, s12, and a point that breaks s2 to two parts, s21, s22, and isScramble(s11, s21) && isScramble(s12, s22) is true, or isScramble(s11, s22. LeetCode题解专栏：LeetCode题解我做的所有的LeetCode的题目都放在这个专栏里，大部分题目Java和Python的解法都有。欢迎大家关注我的专栏。此题链接：OneEditDistan 博文 来自： zhangpeterx的博客 【. License Key Formatting 481. 注：此分类仅供大概参考，没有精雕细琢。有不同意见欢迎评论~ 欢迎参考我的leetcode代码 利用堆栈： http://oj. Given s = " the sky is blue ", we reverse it to be " eulb si yks eht ". Sadly test cases at leetcode are quite weak to check complexity issues. 	Here is a simple code that I created in c that should fix your problem :. I'll keep updating for full summary and better solutions. Quicksort is a fast sorting algorithm, which is used not only for educational purposes, but widely applied in practice. Like Perl, Python source code is also available under the GNU General Public License (GPL). String always consists of two distinct alternating characters. Want to know details of the sliding window algorithm, check my post: The Sliding Window Algorithm for string and array. Since we don't need the orders in the map, we can use unordered_map to speed up the process. This problem's solution is straightforward, only having to be careful to check that you have not arrived to an end of a list. Basically an array…. The encoded string is then sent over the network and is decoded back to the original list of strings. Given an array of integers, return indices of the two numbers such that they add up to a specific target. Thanks to sourabreddy’s medium post about these types of problems, they. Returns true if the stack is empty. INT_MIN: Minimum value for an object of type int-32767 (-2 15 +1) or less*: INT_MAX: Maximum value for an object of type int: 32767 (2 15-1) or greater*: UINT_MAX: Maximum value for an object of type unsigned int. Contiguous Array [leetcode] 322. Watch Queue Queue. Here, we will use the integers 0, 1, and 2 to represent the color red, white, and blue respectively. Best for find out all anagrams in a group of strings. Using Java's String's split method into a String array. Given a string s and a non-empty string p, find all the start indices of p's anagrams in s. 		If there are less than 2k but greater than or equal to k characters, then reverse the first k characters and left the other as original. Note: You may assume all letters are in lowercase. The basic idea is to reverse the whole string firstly, then reverse each word. Watch Queue Queue. Also it's not a company specific stuff, it's just the engineers in that company who want to check how you will approach a problem, can you come up with different approaches, can you discuss the tradeoffs  with some standard problem. com/problems/map-sum-pairs/description/ Problem: Implement a MapSum class with insert, and sum methods. In this chapter we consider another data structure called Linked Lists that. You are responsible to. The core method of the problem is to make sure that the number of each character is no less than half of another character and no exceed two consecutively. The problem is opposite of this post. Understand the problem: The problem looks quite like the grouping anagrams. That is, identifier is not replaced if it appears in a comment, in a string, or as part of a longer identifier. Leetcode Medium Longest Palindromic Substring Java. Leetcode Pattern 3 | Backtracking. The string can contain additional characters after those that form the integral number, which are ignored and have no effect on the behavior of this function. That's the reason, we see small amount of graph problems in leetcode. 	(The occurrences may overlap. OK, I Understand. Watch Queue Queue. LeetCode Examples. In other words, one of the first string's permutations is the substring of the second string. Return all possible palindrome partitioning of s. Note that k is guaranteed to be a positive integer. Given an encoded string, return its decoded string. LeetCode problem 567 Permutation in String (Java) May 15, 2019 May 15, 2019 tinyfool LeetCode. Especially the big ones. A fellow redditor from /r/cscareerquestions pointed me to this awesome thread on leetcode discuss which reveals the sliding window pattern for solving multiple string (substring) problems. Part of this great node. The code passes 43 tests, but it times out on the next one. For example, if string 's two distinct characters are xand y, then t could be xyxyx or yxyxy but notxxyy or xyyx. Input Description: A text string t of length n. What is that going to be? And I encourage you to pause this video, and try to work through it on your own. 		Leetcode 365. The input can be an array, string, matrix, tree, linked list, graph, etc. Solving Tree Problems on LeetCode. The code is almost exactly same as converting a decimal number to string, eg: 1234 -> "1234", except that it is 26 base and beginning from 1 rather than 0 (decimal begins from 0 as 0-9). If the first sequence of non-whitespace characters in str is not a valid integral number, or if no such sequence exists because either str is empty or it contains only whitespace. Given a balanced string s split it in the maximum amount of balanced strings. The function first discards as many whitespace characters as necessary until the first non-whitespace character is found. g, Google, Facebook, Amazon, etc. Our "Array and String" Explore card is the best place to start on LeetCode. Complexity of substring function has changed from O(1) to O(n) as now Java copies whole string into new one and returns it instead of moving pointers in the string. Solution (two pointers). CheatSheet: Leetcode For Code Interview Tag: #array Given a 2D grid of 0s and 1s, return the number of elements in the largest square subgrid that has all 1s on its border, or 0 if such a subgrid doesn’t exist in the grid. Read writing about String in Leetcode 演算法教學. Here is the classification of all 173 problems. A fellow redditor from /r/cscareerquestions pointed me to this awesome thread on leetcode discuss which reveals the sliding window pattern for solving multiple string (substring) problems. 	Problem: Given a roman numeral, convert it to an integer. You can save your projects at Dropbox, GitHub, GoogleDrive and OneDrive to be accessed anywhere and any time. [LeetCode] 518. If the result is 0, s2[i] = 0, s1++. Hint: Carefully consider all possible input cases. The string can contain additional characters after those that form the integral number, which are ignored and have no effect on the behavior of this function. Leetcode 186 Reverse Words in a String II. 题意很简单，给两个string做乘法。无需考虑一些比如string中夹杂字母的case。这里有一个discussion把思路已经解释的非常明白了，我就不讲思路了，直接上代码。. Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string. Abstract idea of a queue: The queue is another data structure. If there are less than 2k but greater than or equal to k characters, then reverse the first k characters and left the other as original. Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. We are given a stack data structure with push and pop operations, the task is to implement a queue using instances of stack data structure and operations on them. cloudfoundry. Leetcode: Sliding Puzzle: 3: Split string by multiple seperator: Leetcode: Brace Expansion: 4: Add a dummy tailing element to simplify code: Leetcode: Brace Expansion: 5: Fast slow pointers: LintCode: Middle of Linked List: 6: Deep copy an array: Leetcode: Combination Sum: 7: Use arrays instead of hashmaps, if possible: Leetcode: Number of Days. Then, starting from this character, takes an optional initial plus or minus sign followed by as many numerical digits as possible, and interprets them as a numerical value. I am currently having a problem of working out how to use the FuzzyWuzzy package where it identifies the 'Name' column and determines whether a similar there are similar Names. leetcode problems | leetcode problems. Problem: Implement strStr(). 		The code is almost exactly same as converting a decimal number to string, eg: 1234 -> "1234", except that it is 26 base and beginning from 1 rather than 0 (decimal begins from 0 as 0-9). Given a balanced string s split it in the maximum amount of balanced strings. Return all possible palindrome partitioning of s. Since we don't need the orders in the map, we can use unordered_map to speed up the process. Similar to the problem of "Excel Sheet Column Number", we want to represent a number with 26 as base. I used to solve a lot of problems on LeetCode, and it'd take me multiple hours to solve "hards" on there. With the same basic idea there are some slight different implementations in details. Then, starting from this character, takes an optional initial plus or minus sign followed by as many numerical digits as possible, and interprets them as a numerical value. Regular Expression Matching Leetcode but in my opinion is easier than that one. Implement atoi which converts a string to an integer. and it isn't a string constant. This problem is very hard if you want to use one sliding window to solve it. Notes: It is intended for this problem to be specified vaguely (ie, no given input specs). Write a function to find the longest common prefix string amongst an array of strings. The number of problems you have solved in LeetCode is only one of the indicators of your familiarness to the patterns, learning the patterns is more than only numbers. [LeetCode] ZigZag Conversion 解题报告 The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility). 	However, the order among letters are unknown to you. Steps: Li Yin. This problem is not difficult but should pay more attention for the corner cases. When the cache reaches its capacity, it should invalidate the least frequently used item before inserting a new item. Longest Palindromic Substring Given a string S, find the longest palindromic substring in S. DA: 59 PA: 41 MOZ Rank: 4. return the strings whose value is larger than 1 in the map. [LeetCode] Best Time to Buy and Sell Stock II Solu [LeetCode] Best Time to Buy and Sell Stock Solutio [LeetCode] Anagrams 解题报告 [LeetCode] Add Binary 解题报告 [LeetCode] ZigZag Conversion 解题报告 [LeetCode] Word Search 解题报告 [LeetCode] Wildcard Matching, Solution [LeetCode] Validate Binary Search Tree 解题报告. Here, we will use the integers 0, 1, and 2 to represent the color red, white, and blue respectively. Input Description: A text string t of length n. Scramble String Leetcode Java  This problem is an advanced dynamic programming problem, first of all, the scrambled string must have the same length with the. 399 Evaluate Division. Given an encoded string, return it's decoded string. There is a new alien language which uses the latin alphabet. [LeetCode] 517. Part II focuses on graph- and string-processing algorithms. Solve LeetCode Problems; Introduction Array 3Sum  Rearrange String k Distance Apart Repeated DNA Sequences Shortest Word Distance II. Given two non-negative integers num1 and num2 represented as string, return the sum of num1 and num2. 		C/C++ Coding Exercise – Reverse Words in a String – LeetCode Online Judge – Using Stack April 7, 2014 2 Comments algorithms , c / c++ , code , data types , implementation , leetcode online judge , programming languages , string. Description: In this problem we have to find the common prefix for all the strings in the array. I want to sort String elements in the array months by length using Arrays. Leetcode problems Uday Singh; 154 videos;  Leetcode 19 Remove Nth Node From End of List  Leetcode 8 String to Integer atoi by Uday Singh. Given a string S, consider all duplicated substrings: (contiguous) substrings of S that occur 2 or more times. LeetCode - Decode String (Java)  The key to solve this problem is convert the string to a structured data structure and recursively form the return string. Regular Expression Matching. Lonely Pixel II February ( 12 ). The string can contain additional characters after those that form the integral number, which are ignored and have no effect on the behavior of this function. Return the maximum amount of splitted balanced strings. Return all possible results. Part of this great node. Leetcode: String to Integer (atoi) in C++  It is intended for this problem to be specified vaguely (ie, no given input specs). Therefore, we need to parse the string until we see the divider. I am currently having a problem of working out how to use the FuzzyWuzzy package where it identifies the 'Name' column and determines whether a similar there are similar Names. Hint: Carefully consider all possible input cases. Want to know details of the sliding window algorithm, check my post: The Sliding Window Algorithm for string and array. If there are less than k characters left, reverse all of them. The input string does not contain leading or trailing spaces and the words are always separated by a single space. 	This is an n**2 solution. Construct Binary Tree from String [LeetCode] 514. Rearrange String k Distance Apart  Solve Leetcode Problems. Problem: Find the first (or all) instances of the pattern in the text. I also want to thank the following two. If the result is 0, s2[i] = 0, s1++. We can copy codes from problem 76 only change serval lines. 求和问题2sum, 3sum, k sum 1. For example, the longest substring without repeating letters for "abcabcbb" is "abc", which the length is 3. The input string does not contain leading or trailing spaces and the words are always separated by a single space. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. Power of Three LeetCode 231. So we still use string but each char we store the difference, because the different is at most 25. You may assume that each input would have exactly one solution, and you may not use the same element twice. This is a Leetcode problem: On a 2 x 3 board, there are 5 tiles represented by the integers 1 through 5 and an empty square represented by 0. Given that Len(S)<=12, a simple recursive solution will do it. LeetCode OJ - Maximum XOR of Two Numbers in an Arr LeetCode OJ - Minimum Moves to Equal Array Element LeetCode OJ - Partition Equal Subset Sum LeetCode OJ - Convert Sorted List to Binary Search LeetCode OJ - Recover Binary Search Tree LeetCode OJ - Decode String LeetCode OJ - Arranging Coins. The encoding rule is: k[encoded_string], where the encoded_string inside the square brackets is being repeated exactly k times. 		`