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