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