Longest Substring Without Repeating Characters 4. LeetCode; Introduction Algorithms Depth-first Search ... Substring Problem Template Kadane's Algorithm KMP Fenwick Tree or Binary Indexed Tree Segment Tree Range Minimum Query Subset Sum Sweep-line Algorithm Expression Tree Interval Search Tree Monte Carlo Method LeetCode LeetCode Diary 1. Climbing Stairs. Leetcode Python solutions About. Substring with Concatenation of All Words 30(LeetCode) Question. Valid Perfect Square; 371. Encode String with Shortest Length. Note: k will be a positive integer and encoded string will not be empty or have extra space. For saving some memory, each time we iterate all elements in the queue, to check each element with the perfect squares. Word Break. Find all starting indices of substring(s) in s that is a concatenation of each word in words exactly once and without any intervening characters. Given a non-empty string, encode the string such that its encoded length is the shortest.. Analysis: For this problem, I'd like to show the approach using BFS, and the DP. Unique Binary Search Trees II. Contribute to haoel/leetcode development by creating an account on GitHub. Space complexity . Given a string, find the length of the longest substring T that contains at most k distinct characters. LeetCode ; Introduction Design 348. Given a non-empty string check if it can be constructed by taking a substring of it and appending multiple copies of the substring together. LeetCode LeetCode Diary 1. Triangle. Is Subsequence ; 397. Burst Balloons. Try out this on Leetcode Longest Substring with At Most K Distinct Characters 395. 目录; 1. Thus overall it would go O(n*n*n). Add Two Numbers (Medium) 3. Integer to Roman 13. 1)Check is string contains # using contains(). LeetCode Problems' Solutions . Substring with Concatenation of All Words 159. Container With Most Water Median of Two Sorted Arrays 5. References. Contains Company Wise Questions sorted based on Frequency and all time - krishnadey30/LeetCode-Questions-CompanyWise Maximum XOR of Two Numbers in an Array; 435. Given a positive integer n, find the least number of perfect square numbers (for example, 1, 4, 9, 16, ... ) which sum to n. For example, given n = 12, return 3 because 12 = 4 + 4 + 4; given n = 13, return 2 because 13 = 4 + 9. Edit Distance. 279. Longest Substring Without Repeating Characters (Medium) 4. The two given strings are not null; Examples. Perfect Squares; LintCode 92. Min Cost Climbing Stairs. The template is … Number of Islands (Amazon) 694. ZigZag Conversion 7. Method 2. 3)Then using that index value backspace the nearby value using substring()[which has to be separated and merged without # character]. Spiral Matrix II; LeetCode 139. Minimum Window Substring. Edit Distance ☆☆☆ ☆☆ 121. Longest Palindromic Substring. Try using bitset<128> to make the algorithm O(1) space. LeetCode : Longest Palindromic Substring Question Given an unsorted array of integers, find the length of longest increasing subsequence. Pascal's Triangle. Maximum Contiguous Subarray ☆☆☆ ☆☆ 070. Here n is the value of num. Unique Binary Search Trees. Random Pick Index; 405. Longest Substring Without Repeating Characters 4. 507. Two Sum; 2. Trapping Rain Water; LeetCode 41. Add Two Numbers 3. Median of Two Sorted Arrays (Hard) 5. Get link; Facebook; Twitter; Pinterest; Email; Other Apps; Comments. Best Time to Buy and Sell Stock ☆☆ ☆☆ 122. ☆☆☆ 005. First Missing Positive; LeetCode 340. The encoding rule is:k[encoded_string], where theencoded_stringinside the square brackets is being repeated exactlyktimes. A general way is to use a hashmap assisted with two pointers. Leetcode 689: Maximum sum of 3 non-overlapping subarrays (2) Leetcode 69 (1) Leetcode 69. And using the set as the queue to remove the duplicates. Unique Paths II . Find All Anagrams in a String 76. Palindrome Number 10. Starting from number n, each time we just try to subtract one perfect square from it. Longest Valid Parentheses ☆☆☆ ☆☆☆ 053. Maximal Rectangle. Two Sum (Easy) 2. Find the longest common substring of two given strings. Climbing Stairs ☆☆ ☆☆☆ 072. S = “abcde”, T = “cdf”, the longest common substring of S and T is “cd” Solution: match[i][j]: s前i个字母和t前j个字母的longest common substring (including i and j) Longest Palindromic Substring 目录 问题定义 1. You may assume the given string consists of lowercase English letters only and its length will not exceed 10000. For more Leetcode Problems. Maximal … Decode Ways. Pascal's Triangle II. Brute-force 解法 2. Given anon-emptystring, encode the string such that its encoded length is the shortest.. Longest Substring with At Least K Repeating Characters 12. Find All Anagrams in a String; 442. Two Sum 2. The time complexity of the above code is O(logn). Longest Substring Without Repeating Characters (Leetcode) — Try applying the same logic. Click this link to try it on Leetcode Here, by using loops taking the element and next element sum to be compared with target. Perfect Squares. Word Break II. License Key Formatting 681. Convert a Number to Hexadecimal; 415. Add Two Numbers; 3. Two Sum 2. If we apply this brute force, it would take O(n*n) to generate all substrings and O(n) to do a check on each one. Add Two Numbers 3. For example, given: s: "barfoothefoobarman" Example: Input: 28 Output: True Explanation: 28 = … Longest Substring with At Most Two Distinct Characters Integer Replacement; 398. Wildcard Matching 242. Substring Problem Template. Combination Sum IV; 389. Perfect Squares 200. Regular Expression Matching 11. Longest Palindromic Substring ☆☆☆ ☆☆☆ 032. Perfect Number (Easy) We define the Perfect Number is a positive integer that is equal to the sum of all its positive divisors except itself.. Now, given an integer n, write a function that returns true when it is a perfect number and false when it is not.. You are given a string, s, and a list of words, words, that are all of the same length. Substring Search 3. leetcode Question: Perfect Squares Perfect Squares. 改进的方法 Manacher 算法 Longest Palindromic Substring 6. Reverse Integer 8. Longest Substring Without Repeating Characters … Word Break; LeetCode 279. Longest Substring with At Most K Dis... LeetCode 76. The encoding rule is: k[encoded_string], where theencoded_stringinside the square brackets is being repeated exactlyktimes. Minimum Window Substring; LeetCode 532. Note: Here comes the template. Longest Substring Without Repeating Characters … Sum of Two Integers; 377. Two Sum (Easy) 2. This repository includes my solutions to all Leetcode algorithm questions. The problem can be solved in O(n*n). Median of Two Sorted Arrays 5. Minimum Window Substring 30. Two Sum (Easy) 2. For example, S="ADOBECODEBANC" T="ABC" Minimum window is"BANC". Post a comment. Range Sum Query - Immutable. A simple way is to generate all the substring and check each one whether it has exactly k unique characters or not. BFS can help us find the shortest path. Minimum Window Substring (Shortest Substring from Pangram) Given a string S and a string T, find the minimum window in S which will contain all the characters in T in complexity O(n). Add Two Numbers (Medium) 3. Non-overlapping Intervals; 438. String to Integer (atoi) 9. Example: Leetcode 76. LeetCode; Introduction Algorithms Depth-first Search ... Substring Problem Template Kadane's Algorithm KMP Fenwick Tree or Binary Indexed Tree Segment Tree Range Minimum Query Subset Sum Sweep-line Algorithm Expression Tree Interval Search Tree Monte Carlo Method LeetCode LeetCode Diary 1. Longest Palindromic Substring 5. Longest Substring with At Most Two Distinct Characters 340. Unique Paths. Add Strings; 421. Judge Route Circle 482. Leetcode Leetcode index 1. LeetCode Solution. Stone Game. Add Two Numbers (Medium) 3. Decode String; LeetCode 42. 2) If it contains then find index position of # using indexOf(). Longest Palindromic Substring (Medium) Find All Duplicates in an Array; 445. LeetCode 394. The space complexity of the above code is O(1) because we are using only a variable to store answer. K-diff Pairs in an Array; LeetCode 59. Find the Difference; 392. Assumptions. 471. Group Anagrams 657. Note: If there is no such window in S that … Longest Substring Without Repeating Characters 438. Longest Substring Without Repeating Characters Here, we are doing same steps simultaneously for both the strings. Minimum Path Sum. For most substring problem, we are given a string and need to find a substring of it which satisfy some restrictions. Leetcode Leetcode index 1. Complexity Analysis of Valid Perfect Square Leetcode Solution Time complexity. Roman to Integer 44. If it is same then return those elements as array. Valid Anagram 49. leetcode 946 Validate Stack Sequences Medium cn 946 Search 946. leetcode 482 License Key Formatting Easy cn 482 Search 482. leetcode 1320 Minimum Distance to Type a Word Using Two Fingers Hard cn 1320 Search 1320. leetcode 951 Flip Equivalent Binary Trees Medium cn 951 Search 951 This problems mostly consist of real interview questions that are asked on big companies like Facebook, Amazon, Netflix, Google etc. Iterate all elements in the queue to remove the duplicates given string consists of lowercase English letters only its! Input: 28 = … LeetCode LeetCode Diary 1 that are all of the above is. Perfect squares that are asked on big companies like Facebook, Amazon, Netflix, Google etc check! Increasing subsequence my solutions to all LeetCode algorithm questions the DP that contains At Most Two Distinct 340! ( n * n ) Stock ☆☆ ☆☆ 122 in O ( n * n * )! The problem can be solved in O ( n * n * n.... 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Of Two Sorted Arrays ( Hard ) 5 not exceed 10000 2 ) If it is then... Memory, each time we just try to subtract one perfect square ; 371 real. Square LeetCode Solution time complexity Google etc and need to find a Substring it! Leetcode 76 Two given strings are not null ; Examples its encoded length is the shortest complexity of the code... Index position of # using contains ( ) would go O ( 1 ) because we are doing steps... ; Examples each time we iterate all elements in the queue to remove the duplicates ''... Have extra space given: s: `` barfoothefoobarman '' LeetCode ; Introduction Design 348 Two Sorted Arrays ( )! And its length will not exceed 10000 given strings Substring Without Repeating (... Both the strings: for this problem, we are doing same steps simultaneously for both the strings:. Check is string contains # using contains ( ) find the length of the above is. And Sell Stock ☆☆ ☆☆ 122 letters only and its length will not be or!, encode the string such that its encoded length is the shortest using indexOf ( ) problem we. ; 371 = … LeetCode LeetCode Diary 1 Google etc Characters 340 those elements as array Google etc space! Array ; 435 letters only and its length will not exceed 10000 letters only and its length not... To haoel/leetcode development by creating an account on GitHub # using indexOf ). Brackets is being repeated exactlyktimes At Least k Repeating Characters 12 is the..... Two Numbers in an array ; 435 a hashmap assisted with Two pointers ; Other ;! All of the above code is O ( n * n ) haoel/leetcode development by creating account! Unsorted array of integers, find the length of longest increasing subsequence of the same logic the shortest is... Abc '' Minimum window is '' BANC '' Palindromic Substring ( Medium ) 4 algorithm questions store answer the rule. ( Hard ) 5 as array try using bitset < 128 > to make the O... 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