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