Maximum Non Negative Product in a Matrix, 1595. Traffic Light Controlled Intersection, 1281. Binary Searchable Numbers in an Unsorted Array, 1967. Count Different Palindromic Subsequences, 744. the last value in dp list indicate if all characters are used out to form dictionarys word. Number of Subsequences That Satisfy the Given Sum Condition, 1502. Making statements based on opinion; back them up with references or personal experience. Number of Operations to Make Network Connected, 1320. Largest Component Size by Common Factor, 967. The word-break problem has optimal substructure. Minimum Moves to Equal Array Elements II, 467. Longest Substring with At Most K Distinct Characters, 363. Guess the Majority in a Hidden Array, 1541. Most Visited Sector in a Circular Track, 1561. Lowest Common Ancestor of a Binary Tree IV, 1680. Remove Stones to Minimize the Total, 1963. Maximum Alternating Subsequence Sum, 1913. Use the previous characters to form words. Check If String Is a Prefix of Array, 1962. Maximum Number of Words Found in Sentences, 2115. Number of Different Subsequences GCDs, 1820. Find a Value of a Mysterious Function Closest to Target, 1523. The word-break problem also exhibits overlapping subproblems, so we will end up solving the same subproblem over and over again. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. If you could give the problem statement, it would be easier to figure what the actual problem is. Reverse Substrings Between Each Pair of Parentheses, 1196. Eliminate Maximum Number of Monsters, 1928. Remove Sub-Folders from the Filesystem, 1234. Special Array With X Elements Greater Than or Equal X, 1611. Count Artifacts That Can Be Extracted, 2202. Count Subarrays With Score Less Than K, 2307. Maximize Sum Of Array After K Negations, 1007. Find Minimum in Rotated Sorted Array II, 158. Minimum Domino Rotations For Equal Row, 1008. Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree, 1431. Serialize and Deserialize Binary Tree, 298. Largest Combination With Bitwise AND Greater Than Zero, 2279. Filter Restaurants by Vegan-Friendly, Price and Distance, 1334. Kth Smallest Element in a Sorted Matrix, 381.

Minimum Cost Homecoming of a Robot in a Grid, 2089. All Elements in Two Binary Search Trees, 10 ~~. Check if Word Can Be Placed In Crossword, 2019. Smallest Rotation with Highest Score, 801. Find Positive Integer Solution for a Given Equation, 1238. Maximum Length of Subarray With Positive Product, 1568. Remove All Adjacent Duplicates In String, 1050. Sum of Digits in the Minimum Number, 1100. Minimum Cost to Reach City With Discounts, 2095. Shortest Unsorted Continuous Subarray, 586. Minimum Score After Removals on a Tree, 2323. Minimum Increment to Make Array Unique, 947. Minimum Subsequence in Non-Increasing Order, 1404. People Whose List of Favorite Companies Is Not a Subset of Another List, 1453. Could someone help me figure out why? Remove Max Number of Edges to Keep Graph Fully Traversable, 1581. Construct the Lexicographically Largest Valid Sequence, 1719. Longest Binary Subsequence Less Than or Equal to K, 2313. Actors and Directors Who Cooperated At Least Three Times, 1058. 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. Longest Repeating Character Replacement, 426. Replace Non-Coprime Numbers in Array, 2200. Sum of Nodes with Even-Valued Grandparent, 1317. Minimum Add to Make Parentheses Valid, 945. Maximum Subarray Sum with One Deletion, 1190. Count Elements With Strictly Smaller and Greater Elements, 2150.

Minimum Number of Days to Make m Bouquets, 1485. Next Greater Numerically Balanced Number, 2051. Find Smallest Common Element in All Rows, 1203. Sort Items by Groups Respecting Dependencies, 1209. The Number of Users That Are Eligible for Discount, 2207. Can a human colony be self-sustaining without sunlight using mushrooms? Maximum Cost of Trip With K Highways, 2249. Minimum Adjacent Swaps to Reach the Kth Smallest Number, 1851. The Score of Students Solving Math Expression, 2020. Number of Ways to Build Sturdy Brick Wall, 2186. Count Square Submatrices with All Ones, 1279. Find All Possible Recipes from Given Supplies, 2116. Group the People Given the Group Size They Belong To, 1283. Best Time to Buy and Sell Stock with Cooldown, 314. Minimize Hamming Distance After Swap Operations, 1723. All the Pairs With the Maximum Number of Common Followers, 1953.

Average Salary: Departments VS Company, 632. Split a String Into the Max Number of Unique Substrings, 1594. All Ancestors of a Node in a Directed Acyclic Graph, 2193. Number of Ways to Wear Different Hats to Each Other, 1437. How to write, Answer for Two lists, how to judge whether the elements in a exist in the elements of B. This version is demonstrated below in C++, Java, and Python: The time complexity of the above solution is exponential and occupies space in the call stack. Maximum Number of Weeks for Which You Can Work, 1954. Sum Of Special Evenly-Spaced Elements In Array, 1717. Number of Pairs of Interchangeable Rectangles, 2002. K Highest Ranked Items Within a Price Range, 2147. Largest Number After Digit Swaps by Parity, 2232. Count Subtrees With Max Distance Between Cities, 1618. Smallest String With A Given Numeric Value, 1665. Numbers With Same Consecutive Differences, 971. Partition Array Such That Maximum Difference Is K, 2300. Sell Diminishing-Valued Colored Balls, 1649. Kth Smallest Product of Two Sorted Arrays, 2041. // dp[i] := true if s[0..i) can be segmented, // s[0..j) can be segmented and s[j..i) in wordSet, # dp[i] := True if s[0..i) can be segmented, # s[0..j) can be segmented and s[j..i) in wordSet, 3. Friend Requests II: Who Has the Most Friends, 615. Convert Binary Number in a Linked List to Integer, 1292. Thanks a lot. Minimum Number of Days to Disconnect Island, 1569. Maximum Value at a Given Index in a Bounded Array, 1805. Lowest Common Ancestor of a Binary Search Tree, 236. You signed in with another tab or window.

Check if Number is a Sum of Powers of Three, 1784.

Number of Ways to Form a Target String Given a Dictionary, 1640. Minimum Number of Increments on Subarrays to Form a Target Array, 1533. Sum of Absolute Differences in a Sorted Array, 1687. Maximum Number of Occurrences of a Substring, 1298. Number of Ways to Reorder Array to Get Same BST, 1574. Count Number of Maximum Bitwise-OR Subsets, 2045. Friendly Movies Streamed Last Month, 1497. If you think it is OK, you are welcome to pay attention to it. Customer Who Visited but Did Not Make Any Transactions, 1582. Find the Distance Value Between Two Arrays, 1389. Divide Array Into Increasing Sequences, 1123. Choose Numbers From Two Arrays in Range, 2144. Logical OR of Two Binary Grids Represented as Quad-Trees, 562. Minimum Moves to Reach Target Score, 2141. Maximum Good People Based on Statements, 2152. Minimum Operations to Halve Array Sum, 2209. Given a string s and a dictionary of words dict, determine if s can be segmented into a space-separated sequence of one or more dictionary words. Paths in Maze That Lead to Same Room, 2078. The Category of Each Member in the Store, 2052. Find the Winner of the Circular Game, LeetCode1305.

Check if All the Integers in a Range Are Covered, 1894. Number of Ways to Divide a Long Corridor, 2148. Maximum Distance Between a Pair of Values, 1857. No votes so far! It fails on those test cases because storage will not be reset to an empty set between consecutive runs of tests, and so it will have false information about a next test case. Optimize Water Distribution in a Village, 1170. Maximum Number of Non-Overlapping Substrings, 1521. Count Ways to Make Array With Product, 1736. // return true if the end of the string is reached, // return true if the prefix is present in the dictionary and the, // remaining string also forms a space-separated sequence of, # Function to determine if a string can be segmented into space-separated. Minimum Cost to Make at Least One Valid Path in a Grid, 1369. Find Numbers with Even Number of Digits, 1296. Maximum Number of Groups Getting Fresh Donuts, 1819. Concatenation of Consecutive Binary Numbers, 1684. Serialize and Deserialize N-ary Tree, 430. Minimum Moves to Reach Target with Rotations, 1213. Minimum Elements to Add to Form a Given Sum, 1786. An adventure in Data Structures and Algorithms [Part 1], LeetCode: Isomorphic Strings O(n) Python3, Largest Number At Least Twice of Others | LeetCode Problem #1 |Python. Form Array by Concatenating Subarrays of Another Array, 1767. For example, Why is my solution unable to pass Leetcode Word-break question, leetcode.com/explore/interview/card/amazon/80/, How APIs can take the pain out of legacy system headaches (Ep. Maximum Number of Achievable Transfer Requests, 1602. Minimum Number of Operations to Make String Sorted, 1835. Count Positions on Street With Required Brightness, 2238. Mean of Array After Removing Some Elements, 1620. Maximum Length of a Concatenated String with Unique Characters, 1240. Widest Pair of Indices With Equal Range Sum, 1984. Kids With the Greatest Number of Candies, 1432. Print Immutable Linked List in Reverse, 1269. If you like my articles / videos, donations are welcome. Percentage of Users Attended a Contest, 1634. Unique Substrings With Equal Digit Frequency, 2170. Minimum One Bit Operations to Make Integers Zero, 1612. If you know how to estimate it, please let me know. Learn on the go with our new app. Equal Sum Arrays With Minimum Number of Operations, 1779.

The Number of the Smallest Unoccupied Chair, 1944. Even if you fix that problem, your algorithm will be too slow to pass all tests. Maximum Product of Two Elements in an Array, 1465. Max Difference You Can Get From Changing an Integer, 1433. Number of Ways to Build House of Cards, 2190. Check If All 1's Are at Least Length K Places Away, 1438.

Find Minimum Time to Finish All Jobs, 1724. Maximize the Topmost Element After K Moves, 2203. Substrings That Begin and End With the Same Letter, 2084. Two Furthest Houses With Different Colors, 2083. Remove Duplicates from Sorted List II, 103.

Get the Second Most Recent Activity, 1371. Data Imbalance: what would be an ideal number(ratio) of newly added class's data? Final Value of Variable After Performing Operations, 2014. Minimum Number of Operations to Make Array Continuous, 2010. Count Number of Rectangles Containing Each Point, 2259. Longest Path With Different Adjacent Characters, 2247. This method is demonstrated below in C++, Java, and Python: The time complexity of the above solution is O(n2) and requires O(n) extra space, where n is the length of the input string. Cannot retrieve contributors at this time. Average Salary Excluding the Minimum and Maximum Salary, 1493. Build Binary Expression Tree From Infix Expression, 1599. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Customer Placing the Largest Number of Orders, 597. Maximum of Absolute Value Expression, 1135. Number of Subarrays with Bounded Maximum, 798. Can Make Arithmetic Progression From Sequence, 1503. Populating Next Right Pointers in Each Node II, 153. Minimum Possible Integer After at Most K Adjacent Swaps On Digits, 1509. unordered_set dict(wordDict.cbegin(), wordDict.cend()); // Query the answer of the original string. Longest Substring with At Least K Repeating Characters, 421. Determine Whether Matrix Can Be Obtained By Rotation, 1887. Find Original Array From Doubled Array, 2009. Airplane Seat Assignment Probability, 1228. Count Pairs of Equal Substrings With Minimum Difference, 1798. Answer for Can Babel node execute import and export? Maximize Palindrome Length From Subsequences, 1775. Triples with Bitwise AND Equal To Zero, 987. Remove All Occurrences of a Substring, 1911. Minimum Number of Arrows to Burst Balloons, 453. We have seen that the problem can be broken down into smaller subproblem, which can further be broken down into yet smaller subproblem, and so on. Divide Array in Sets of K Consecutive Numbers, 1297. Find Nearest Right Node in Binary Tree, 1604. Design a Stack With Increment Operation, 1385. Minimum Cost to Connect Two Groups of Points, 1596. Maximum Profit of Operating a Centennial Wheel, 1601. he same word in the dictionary may be reused multiple times in the segmentation.

Partition Array Into Two Arrays to Minimize Sum Difference, 2037. Find Three Consecutive Integers That Sum to a Given Number, 2178. Minimum Number of Work Sessions to Finish the Tasks, 1989. Remove One Element to Make the Array Strictly Increasing, 1910. Minimum Swaps To Make Sequences Increasing, 828. Minimum Deletions to Make Array Beautiful, 2218. Minimum Number of Flips to Make the Binary String Alternating, 1889. Number of People That Can Be Seen in a Grid, 2283. Find the Kth Largest Integer in the Array, 1986.

Sort Integers by The Number of 1 Bits, 1358. Verify Preorder Serialization of a Binary Tree, 340. Maximum Fruits Harvested After at Most K Steps, 2107. My solution works by searching the wordDict for a word that is in the string. Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit, 1439. Get Biggest Three Rhombus Sums in a Grid, 1880. Users With Two Purchases Within Seven Days, 2230. Leftmost Column with at Least a One, 1430. Find the City With the Smallest Number of Neighbors at a Threshold Distance, 1335. Convert Sorted Array to Binary Search Tree, 109. Design an Expression Tree With Evaluate Function, 1633. Minimum Garden Perimeter to Collect Enough Apples, 1955. Largest Number After Mutating Substring, 1950. Maximum Running Time of N Computers, 2142. Find Kth Largest XOR Coordinate Value, 1741. Most Frequent Number Following Key In an Array, 2192. So I emptied at the end of function.

Find N Unique Integers Sum up to Zero, 1305. Longest Subsequence Repeated k Times, 2015. Sort Linked List Already Sorted Using Absolute Values, 2047. Find the Longest Valid Obstacle Course at Each Position, 1966. Number of Times Binary String Is Prefix-Aligned, 1376. Queries on Number of Points Inside a Circle, 1830. Words in the dictionary can be reused when splitting. We iterate all dp array, it will cost O(n+1), each value will iterate all its previous value, it will cost ((n+1)*(n+1-1)), in total will be O(n^2+n) and It is O(n^2). Maximum Difference Between Node and Ancestor, 1028. Number of Substrings Containing All Three Characters, 1359. Time Needed to Inform All Employees, 1378. Random Point in Non-overlapping Rectangles, 524. # return true if the end of the string is reached, # return true if the prefix is present in the dictionary and the remaining, # string also forms a space-separated sequence of one or more, # return false if the string can't be segmented, // `n` stores length of the current substring, // if the subproblem is seen for the first time, // mark subproblem as seen (0 initially assuming string, // if the prefix is found in the dictionary, then recur for the suffix, // return true if the string can be segmented, // return solution to the current subproblem, // set of strings to represent a dictionary, // we can also use a Trie or a vector to store a dictionary, // lookup array to store solutions to subproblems, // lookup[i] stores if substring word[n-in) can be segmented or not, // Function to determine if a string can be segmented into, // Set of strings to represent a dictionary, // we can also use a Trie or a List to store a dictionary, # `n` stores length of the current substring, # return true if the end of the string is reached, # if the subproblem is seen for the first time, # mark subproblem as seen (0 initially assuming string, # if the prefix is found in the dictionary, then recur for the suffix, # return true if the string can be segmented, # return solution to the current subproblem, # Set of strings to represent a dictionary, # we can also use a Trie or a List to store a dictionary, # lookup table to store solutions to subproblems, # lookup[i] stores if substring word[n-in) can be segmented or not, Implement a bottom-up version of the above solution, Find optimal cost to construct a binary search tree. Minimum Operations to Make the Array Alternating, 2171. Maximize Number of Subsequences in a String, 2208. Longest Common Subsequence Between Sorted Arrays, 1941. The Number of Seniors and Juniors to Join the Company II, 2011. # cut(i+1) = OR{cut(j) and s[j:i] is a word for 0 <= j < i}. bool wBreak(string &s, vector& wordDict) { if (m.count(s)) return m[s]; for (auto word : wordDict) { string left = s.substr(0, word.size()); if (!m.count(left) || m[left] == false) continue; string right = s.substr(word.size()); if (wBreak(right, wordDict)) return m[s]=true; } return m[s]=false; } private: unordered_map m; }; // Create a hashset of words for fast query. The First Day of the Maximum Recorded Degree in Each City, 2316. Number of Longest Increasing Subsequence, 674. Minimum Interval to Include Each Query, 1855. Number of Trusted Contacts of a Customer, 1365. Primary Department for Each Employee, 1790. Minimum Difficulty of a Job Schedule, 1339. Partition Array into Disjoint Intervals, 921. Find the Start and End Number of Continuous Ranges, 1287. Check if Binary String Has at Most One Segment of Ones, 1785. Be the first to rate this post. Find All Lonely Numbers in the Array, 2151. Number of Dice Rolls With Target Sum, 1156. Minimum Score Triangulation of Polygon, 1047. Count Words Obtained After Adding a Letter, 2136. Build Array Where You Can Find The Maximum Exactly K Comparisons, 1422. Verify Preorder Sequence in Binary Search Tree, 297. Once it finds a word, it recursively runs the algorithm on the left and right side with of course, Correct me if I'm wrong but there could be a case where my algorithm works better if the wordDict doesn't have many strings but each string is very long. Frequency of the Most Frequent Element, 1839. Maximum XOR With an Element From Array, 1712. Flip Binary Tree To Match Preorder Traversal, 982. Minimum ASCII Delete Sum for Two Strings, 714. Longest Palindrome by Concatenating Two Letter Words, 2133.

Can You Eat Your Favorite Candy on Your Favorite Day? Smallest Subsequence of Distinct Characters, 1085. Check If Two String Arrays are Equivalent, 1663. Find the Subtasks That Did Not Execute, 1769. Build an Array With Stack Operations, 1442. Lowest Common Ancestor of a Binary Tree, 255. Longest Substring Of All Vowels in Order, 1846. Count Number of Ways to Place Houses, 2322. Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Longest Substring Without Repeating Characters, 17.

Its too hard for me to compute time/space complexity of this approach because the calling stack is hard to estimate. Intersection of Three Sorted Arrays, 1217. Last Moment Before All Ants Fall Out of a Plank, 1505. Replace Employee ID With The Unique Identifier, 1379. Minimum Non-Zero Product of the Array Elements, 1972. Remove All Ones With Row and Column Flips, 2131. If the prefix is a valid word, add it to the output string and recur for the remaining string. Maximum White Tiles Covered by a Carpet, 2273. Count Subarrays With More Ones Than Zeros, 2033. Find the Most Competitive Subsequence, 1674. Check if Numbers Are Ascending in a Sentence, 2044.

Max Dot Product of Two Subsequences, 1460. Find Two Non-overlapping Sub-arrays Each With Target Sum, 1481. Number of Valid Move Combinations On Chessboard, 2058. Insufficient Nodes in Root to Leaf Paths, 1081. Divide a String Into Groups of Size k, 2139. Check if There Is a Valid Parentheses String Path, 2271. Final Prices With a Special Discount in a Shop, 1477. Remove Colored Pieces if Both Neighbors are the Same Color, 2039. Number of Ways to Rearrange Sticks With K Sticks Visible, 1867. Minimize the Difference Between Target and Chosen Elements, 1983. Number Of Ways To Reconstruct A Tree, 1722. Earliest Possible Day of Full Bloom, 2137. Determine if String Halves Are Alike, 1707. Find the Kth Smallest Sum of a Matrix With Sorted Rows, 1441. Reconstruct Original Digits from English, 424. Minimum Operations to Make the Array Increasing, 1828. set updp[i]In order to split the first I substrings, the specific algorithm is as follows: I substring before [0, I-1]dp[i]As mentioned above, judge whether the front part of the two parts is true and whether the back part is in the word list. Removing Minimum Number of Magic Beans, 2174. 1746. Oracle learning notes 24: return result set of custom functions, React router DOM V6 class component class implements programmatic route navigation, LeetCode No875. Number of Ways Where Square of Number Is Equal to Product of Two Numbers, 1579. All Valid Triplets That Can Represent a Country, 1624. Maximum Candies Allocated to K Children, 2228. Products With Three or More Orders in Two Consecutive Years, 2294. Reverse Nodes in Even Length Groups, 2077. Check if Every Row and Column Contains All Numbers, 2134. Find Greatest Common Divisor of Array, 1981. Replace All ? How Many Numbers Are Smaller Than the Current Number, 1368. Prime Number of Set Bits in Binary Representation, 774. Longest Word in Dictionary through Deleting, 549. Maximum Number of Words You Can Type, 1939. Element Appearing More Than 25% In Sorted Array, 1290. Subarray With Elements Greater Than Varying Threshold, 2335. Minimum Absolute Difference Queries, 1909. Count Ways to Build Rooms in an Ant Colony, 1921. Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold, 1347. Minimum Rounds to Complete All Tasks, 2245. Average Time of Process per Machine, 1662. The Number of Seniors and Juniors to Join the Company, 2005. Minimum Difference in Sums After Removal of Elements, 2164. What's the reverse of DateValue[, "YearExact"]? Alert Using Same Key-Card Three or More Times in a One Hour Period, 1605. Whether the following parts are in the word list. Make Array Non-decreasing or Non-increasing, 2264. Maximum Value of K Coins From Piles, 2220. Find Elements in a Contaminated Binary Tree, 1263. Checking Existence of Edge Length Limited Paths II, 1725. Minimum Deletions to Make Array Divisible. Are we deemed to guess the Leetcode problem ?? Widest Vertical Area Between Two Points Containing No Points, 1638. & s, const unordered_set& dict) {. Count Lattice Points Inside a Circle, 2250. Count Hills and Valleys in an Array, 2212. Minimum Obstacle Removal to Reach Corner, 2292. Delete the Middle Node of a Linked List, 2096. How can I drop the voltage of a 5V DC power supply from 5.5V to 5.1V? Maximum Absolute Sum of Any Subarray, 1750. Unique Length-3 Palindromic Subsequences, 1931. Kth Smallest Number in Multiplication Table, 671.

Count Equal and Divisible Pairs in an Array, 2177. Minimize Rounding Error to Meet Target, 1059. Check If String Is Transformable With Substring Sort Operations, 1589. Compare Strings by Frequency of the Smallest Character, 1171. Its trivial that we can use DFS approach to solve this problem. 's to Avoid Consecutive Repeating Characters, 1577. At each character of the given string, we can check substrings that we visited before to know if the substring that end at current index is also a break. Second Minimum Time to Reach Destination, 2046. Preimage Size of Factorial Zeroes Function, 795. Minimum Number of Steps to Make Two Strings Anagram, 1351. Determine Color of a Chessboard Square, 1815. Find Cumulative Salary of an Employee, 581. Find the Minimum Number of Fibonacci Numbers Whose Sum Is K, 1415. Number of Students Unable to Eat Lunch, 1703. Find Smallest Letter Greater Than Target, 747. Maximum Value of K Coins From Piles, LeetCode Weekly Contest 135 (1037, 1038, 1039, 1040), LeetCode Weekly Contest 134 (1033,1034,1035,1036), LeetCode Weekly Contest 132 (1025,1026,1027,1028). Minimum Operations to Make Array Equal, 1553. Minimum Value to Get Positive Step by Step Sum, 1414. Minimum Number of Operations to Convert Time, 2225. Count the Number of Consistent Strings, 1685. Find Resultant Array After Removing Anagrams, 2274.