LeetCode

LeetCode Problems' Solutions [力扣 ∙ 话题分类]

[1-50]	[51-100]	[101-150]	[151-200]	[201-250]	[251-300]
[301-350]	[351-400]	[401-450]	[451-500]	[501-550]	[551-600]
[601-650]	[651-700]	[701-750]	[751-800]	[801-850]	[851-900]
[901-950]	[951-1000]	[1001-1050]	[1051-1100]	[1101-1150]	[1151-1200]
[1201-1250]	[1251-1300]	[1301-1350]	[1351-1400]	[1401-1450]	[1451-1500]
[1501-1550]	[1551-1600]	[1601-1650]	[1651-1700]	[1701-1750]	[1751-1800]
[1801-1850]	[1851-1900]	[1901-1950]	[1951-2000]	[2001-2050]	[2051-2100]

#	Title	Solution	Difficulty
1857	Largest Color Value in a Directed Graph	Go	Hard
1856	Maximum Subarray Min-Product	Go	Medium
1855	Maximum Distance Between a Pair of Values	Go	Medium
1854	Maximum Population Year	Go	Easy
1853	Convert Date Format 🔒	MySQL	Easy
1852	Distinct Numbers in Each Subarray 🔒	Go	Medium
1851	Minimum Interval to Include Each Query	Go	Hard
1850	Minimum Adjacent Swaps to Reach the Kth Smallest Number	Go	Medium
1849	Splitting a String Into Descending Consecutive Values	Go	Medium
1848	Minimum Distance to the Target Element	Go	Easy
1847	Closest Room	Go	Hard
1846	Maximum Element After Decreasing and Rearranging	Go	Medium
1845	Seat Reservation Manager	Go	Medium
1844	Replace All Digits with Characters	Go	Easy
1843	Suspicious Bank Accounts 🔒	MySQL	Medium
1842	Next Palindrome Using Same Digits 🔒	Go	Hard
1841	League Statistics 🔒	MySQL	Medium
1840	Maximum Building Height	Go	Hard
1839	Longest Substring Of All Vowels in Order	Go	Medium
1838	Frequency of the Most Frequent Element	Go	Medium
1837	Sum of Digits in Base K	Go	Easy
1836	Remove Duplicates From an Unsorted Linked List 🔒	Go	Medium
1835	Find XOR Sum of All Pairs Bitwise AND	Go	Hard
1834	Single-Threaded CPU	Go	Medium
1833	Maximum Ice Cream Bars	Go	Medium
1832	Check if the Sentence Is Pangram	Go	Easy
1831	Maximum Transaction Each Day 🔒	MySQL	Medium
1830	Minimum Number of Operations to Make String Sorted	Go	Hard
1829	Maximum XOR for Each Query	Go	Medium
1828	Queries on Number of Points Inside a Circle	Go	Medium
1827	Minimum Operations to Make the Array Increasing	Go	Easy
1826	Faulty Sensor 🔒	Go	Easy
1825	Finding MK Average	Go	Hard
1824	Minimum Sideway Jumps	Go	Medium
1823	Find the Winner of the Circular Game	Go	Medium
1822	Sign of the Product of an Array	Go	Easy
1821	Find Customers With Positive Revenue this Year 🔒	MySQL	Easy
1820	Maximum Number of Accepted Invitations 🔒	Go	Medium
1819	Number of Different Subsequences GCDs	Go	Hard
1818	Minimum Absolute Sum Difference	Go	Medium
1817	Finding the Users Active Minutes	Go	Medium
1816	Truncate Sentence	Go	Easy
1815	Maximum Number of Groups Getting Fresh Donuts	Go	Hard
1814	Count Nice Pairs in an Array	Go	Medium
1813	Sentence Similarity III	Go	Medium
1812	Determine Color of a Chessboard Square	Go	Easy
1811	Find Interview Candidates 🔒	MySQL	Medium
1810	Minimum Path Cost in a Hidden Grid 🔒	Go	Medium
1809	Ad-Free Sessions 🔒	MySQL	Easy
1808	Maximize Number of Nice Divisors	Go	Hard
1807	Evaluate the Bracket Pairs of a String	Go	Medium
1806	Minimum Number of Operations to Reinitialize a Permutation	Go	Medium
1805	Number of Different Integers in a String	Go	Easy
1804	Implement Trie II (Prefix Tree) 🔒	Go	Medium
1803	Count Pairs With XOR in a Range	Go	Hard
1802	Maximum Value at a Given Index in a Bounded Array	Go	Medium
1801	Number of Orders in the Backlog	Go	Medium
1800	Maximum Ascending Subarray Sum	Go	Easy
1799	Maximize Score After N Operations	Go	Hard
1798	Maximum Number of Consecutive Values You Can Make	Go	Medium
1797	Design Authentication Manager	Go	Medium
1796	Second Largest Digit in a String	Go	Easy
1795	Rearrange Products Table 🔒	MySQL	Easy
1794	Count Pairs of Equal Substrings With Minimum Difference 🔒	Go	Medium
1793	Maximum Score of a Good Subarray	Go	Hard
1792	Maximum Average Pass Ratio	Go	Medium
1791	Find Center of Star Graph	Go	Medium
1790	Check if One String Swap Can Make Strings Equal	Go	Easy
1789	Primary Department for Each Employee 🔒	MySQL	Easy
1788	Maximize the Beauty of the Garden 🔒	Go	Hard
1787	Make the XOR of All Segments Equal to Zero	Go	Hard
1786	Number of Restricted Paths From First to Last Node	Go	Medium
1785	Minimum Elements to Add to Form a Given Sum	Go	Medium
1784	Check if Binary String Has at Most One Segment of Ones	Go	Easy
1783	Grand Slam Titles 🔒	MySQL	Medium
1782	Count Pairs Of Nodes	Go	Hard
1781	Sum of Beauty of All Substrings	Go	Medium
1780	Check if Number is a Sum of Powers of Three	Go	Medium
1779	Find Nearest Point That Has the Same X or Y Coordinate	Go	Easy
1778	Shortest Path in a Hidden Grid 🔒	Go	Medium
1777	Product's Price for Each Store 🔒	MySQL	Easy
1776	Car Fleet II	Go	Hard
1775	Equal Sum Arrays With Minimum Number of Operations	Go	Medium
1774	Closest Dessert Cost	Go	Medium
1773	Count Items Matching a Rule	Go	Easy
1772	Sort Features by Popularity 🔒	Go	Medium
1771	Maximize Palindrome Length From Subsequences	Go	Hard
1770	Maximum Score from Performing Multiplication Operations	Go	Medium
1769	Minimum Number of Operations to Move All Balls to Each Box	Go	Medium
1768	Merge Strings Alternately	Go	Easy
1767	Find the Subtasks That Did Not Execute 🔒	MySQL	Hard
1766	Tree of Coprimes	Go	Hard
1765	Map of Highest Peak	Go	Medium
1764	Form Array by Concatenating Subarrays of Another Array	Go	Medium
1763	Longest Nice Substring	Go	Easy
1762	Buildings With an Ocean View 🔒	Go	Medium
1761	Minimum Degree of a Connected Trio in a Graph	Go	Hard
1760	Minimum Limit of Balls in a Bag	Go	Medium
1759	Count Number of Homogenous Substrings	Go	Medium
1758	Minimum Changes To Make Alternating Binary String	Go	Easy
1757	Recyclable and Low Fat Products 🔒	MySQL	Easy
1756	Design Most Recently Used Queue 🔒	Go	Medium
1755	Closest Subsequence Sum	Go	Hard
1754	Largest Merge Of Two Strings	Go	Medium
1753	Maximum Score From Removing Stones	Go	Medium
1752	Check if Array Is Sorted and Rotated	Go	Easy
1751	Maximum Number of Events That Can Be Attended II	Go	Hard
1750	Minimum Length of String After Deleting Similar Ends	Go	Medium
1749	Maximum Absolute Sum of Any Subarray	Go	Medium
1748	Sum of Unique Elements	Go	Easy
1747	Leetflex Banned Accounts 🔒	MySQL	Medium
1746	Maximum Subarray Sum After One Operation 🔒	Go	Medium
1745	Palindrome Partitioning IV	Go	Hard
1744	Can You Eat Your Favorite Candy on Your Favorite Day?	Go	Medium
1743	Restore the Array From Adjacent Pairs	Go	Medium
1742	Maximum Number of Balls in a Box	Go	Easy
1741	Find Total Time Spent by Each Employee 🔒	MySQL	Easy
1740	Find Distance in a Binary Tree 🔒	Go	Medium
1739	Building Boxes	Go	Hard
1738	Find Kth Largest XOR Coordinate Value	Go	Medium
1737	Change Minimum Characters to Satisfy One of Three Conditions	Go	Medium
1736	Latest Time by Replacing Hidden Digits	Go	Easy
1735	Count Ways to Make Array With Product	Go	Hard
1734	Decode XORed Permutation	Go	Medium
1733	Minimum Number of People to Teach	Go	Medium
1732	Find the Highest Altitude	Go	Easy
1731	The Number of Employees Which Report to Each Employee 🔒	MySQL	Easy
1730	Shortest Path to Get Food 🔒	Go	Medium
1729	Find Followers Count 🔒	MySQL	Easy
1728	Cat and Mouse II	Go	Hard
1727	Largest Submatrix With Rearrangements	Go	Medium
1726	Tuple with Same Product	Go	Medium
1725	Number Of Rectangles That Can Form The Largest Square	Go	Easy
1724	Checking Existence of Edge Length Limited Paths II 🔒	Go	Hard
1723	Find Minimum Time to Finish All Jobs	Go	Hard
1722	Minimize Hamming Distance After Swap Operations	Go	Medium
1721	Swapping Nodes in a Linked List	Go	Medium
1720	Decode XORed Array	Go	Easy
1719	Number Of Ways To Reconstruct A Tree	Go	Hard
1718	Construct the Lexicographically Largest Valid Sequence	Go	Medium
1717	Maximum Score From Removing Substrings	Go	Medium
1716	Calculate Money in Leetcode Bank	Go	Easy
1715	Count Apples and Oranges 🔒	MySQL	Medium
1714	Sum Of Special Evenly-Spaced Elements In Array 🔒	Go	Hard
1713	Minimum Operations to Make a Subsequence	Go	Hard
1712	Ways to Split Array Into Three Subarrays	Go	Medium
1711	Count Good Meals	Go	Medium
1710	Maximum Units on a Truck	Go	Easy
1709	Biggest Window Between Visits 🔒	MySQL	Medium
1708	Largest Subarray Length K 🔒	Go	Easy
1707	Maximum XOR With an Element From Array	Go	Hard
1706	Where Will the Ball Fall	Go	Medium
1705	Maximum Number of Eaten Apples	Go	Medium
1704	Determine if String Halves Are Alike	Go	Easy
1703	Minimum Adjacent Swaps for K Consecutive Ones	Go	Hard
1702	Maximum Binary String After Change	Go	Medium
1701	Average Waiting Time	Go	Medium
1700	Number of Students Unable to Eat Lunch	Go	Easy
1699	Number of Calls Between Two Persons 🔒	MySQL	Medium
1698	Number of Distinct Substrings in a String 🔒	Go	Medium
1697	Checking Existence of Edge Length Limited Paths	Go	Hard
1696	Jump Game VI	Go	Medium
1695	Maximum Erasure Value	Go	Medium
1694	Reformat Phone Number	Go	Easy
1693	Daily Leads and Partners 🔒	MySQL	Easy
1692	Count Ways to Distribute Candies 🔒	Go	Hard
1691	Maximum Height by Stacking Cuboids	Go	Hard
1690	Stone Game VII	Go	Medium
1689	Partitioning Into Minimum Number Of Deci-Binary Numbers	Go	Medium
1688	Count of Matches in Tournament	Go	Easy
1687	Delivering Boxes from Storage to Ports	Go	Hard
1686	Stone Game VI	Go	Medium
1685	Sum of Absolute Differences in a Sorted Array	Go	Medium
1684	Count the Number of Consistent Strings	Go	Easy
1683	Invalid Tweets 🔒	MySQL	Easy
1682	Longest Palindromic Subsequence II 🔒	Go	Medium
1681	Minimum Incompatibility	Go	Hard
1680	Concatenation of Consecutive Binary Numbers	Go	Medium
1679	Max Number of K-Sum Pairs	Go	Medium
1678	Goal Parser Interpretation	Go	Easy
1677	Product's Worth Over Invoices 🔒	MySQL	Easy
1676	Lowest Common Ancestor of a Binary Tree IV 🔒	Go	Medium
1675	Minimize Deviation in Array	Go	Hard
1674	Minimum Moves to Make Array Complementary	Go	Medium
1673	Find the Most Competitive Subsequence	Go	Medium
1672	Richest Customer Wealth	Go	Easy
1671	Minimum Number of Removals to Make Mountain Array	Go	Hard
1670	Design Front Middle Back Queue	Go	Medium
1669	Merge In Between Linked Lists	Go	Medium
1668	Maximum Repeating Substring	Go	Easy
1667	Fix Names in a Table 🔒	MySQL	Easy
1666	Change the Root of a Binary Tree 🔒	Go	Medium
1665	Minimum Initial Energy to Finish Tasks	Go	Hard
1664	Ways to Make a Fair Array	Go	Medium
1663	Smallest String With A Given Numeric Value	Go	Medium
1662	Check If Two String Arrays are Equivalent	Go	Easy
1661	Average Time of Process per Machine 🔒	MySQL	Easy
1660	Correct a Binary Tree 🔒	Go	Medium
1659	Maximize Grid Happiness	Go	Hard
1658	Minimum Operations to Reduce X to Zero	Go	Medium
1657	Determine if Two Strings Are Close	Go	Medium
1656	Design an Ordered Stream	Go	Easy
1655	Distribute Repeating Integers	Go	Hard
1654	Minimum Jumps to Reach Home	Go	Medium
1653	Minimum Deletions to Make String Balanced	Go	Medium
1652	Defuse the Bomb	Go	Easy
1651	Hopper Company Queries III 🔒	MySQL	Hard
1650	Lowest Common Ancestor of a Binary Tree III 🔒	Go	Medium
1649	Create Sorted Array through Instructions	Go	Hard
1648	Sell Diminishing-Valued Colored Balls	Go	Medium
1647	Minimum Deletions to Make Character Frequencies Unique	Go	Medium
1646	Get Maximum in Generated Array	Go	Easy
1645	Hopper Company Queries II 🔒	MySQL	Hard
1644	Lowest Common Ancestor of a Binary Tree II 🔒	Go	Medium
1643	Kth Smallest Instructions	Go	Hard
1642	Furthest Building You Can Reach	Go	Medium
1641	Count Sorted Vowel Strings	Go	Medium
1640	Check Array Formation Through Concatenation	Go	Easy
1639	Number of Ways to Form a Target String Given a Dictionary	Go	Hard
1638	Count Substrings That Differ by One Character	Go	Medium
1637	Widest Vertical Area Between Two Points Containing No Points	Go	Medium
1636	Sort Array by Increasing Frequency	Go	Easy
1635	Hopper Company Queries I 🔒	MySQL	Hard
1634	Add Two Polynomials Represented as Linked Lists 🔒	Go	Medium
1633	Percentage of Users Attended a Contest 🔒	MySQL	Easy
1632	Rank Transform of a Matrix	Go	Hard
1631	Path With Minimum Effort	Go	Medium
1630	Arithmetic Subarrays	Go	Medium
1629	Slowest Key	Go	Easy
1628	Design an Expression Tree With Evaluate Function 🔒	Go	Medium
1627	Graph Connectivity With Threshold	Go	Hard
1626	Best Team With No Conflicts	Go	Medium
1625	Lexicographically Smallest String After Applying Operations	Go	Medium
1624	Largest Substring Between Two Equal Characters	Go	Easy
1623	All Valid Triplets That Can Represent a Country 🔒	MySQL	Easy
1622	Fancy Sequence	Go	Hard
1621	Number of Sets of K Non-Overlapping Line Segments	Go	Medium
1620	Coordinate With Maximum Network Quality	Go	Medium
1619	Mean of Array After Removing Some Elements	Go	Easy
1618	Maximum Font to Fit a Sentence in a Screen 🔒	Go	Medium
1617	Count Subtrees With Max Distance Between Cities	Go	Hard
1616	Split Two Strings to Make Palindrome	Go	Medium
1615	Maximal Network Rank	Go	Medium
1614	Maximum Nesting Depth of the Parentheses	Go	Easy
1613	Find the Missing IDs 🔒	MySQL	Medium
1612	Check If Two Expression Trees are Equivalent 🔒	Go	Medium
1611	Minimum One Bit Operations to Make Integers Zero	Go	Hard
1610	Maximum Number of Visible Points	Go	Hard
1609	Even Odd Tree	Go	Medium
1608	Special Array With X Elements Greater Than or Equal X	Go	Easy
1607	Sellers With No Sales 🔒	MySQL	Easy
1606	Find Servers That Handled Most Number of Requests	Go	Hard
1605	Find Valid Matrix Given Row and Column Sums	Go	Medium
1604	Alert Using Same Key-Card Three or More Times in a One Hour Period	Go	Medium
1603	Design Parking System	Go	Easy
1602	Find Nearest Right Node in Binary Tree 🔒	Go	Medium
1601	Maximum Number of Achievable Transfer Requests	Go	Hard
1600	Throne Inheritance	Go	Medium
1599	Maximum Profit of Operating a Centennial Wheel	Go	Medium
1598	Crawler Log Folder	Go	Easy
1597	Build Binary Expression Tree From Infix Expression 🔒	Go	Hard
1596	The Most Frequently Ordered Products for Each Customer 🔒	MySQL	Medium
1595	Minimum Cost to Connect Two Groups of Points	Go	Hard
1594	Maximum Non Negative Product in a Matrix	Go	Medium
1593	Split a String Into the Max Number of Unique Substrings	Go	Medium
1592	Rearrange Spaces Between Words	Go	Easy
1591	Strange Printer II	Go	Hard
1590	Make Sum Divisible by P	Go	Medium
1589	Maximum Sum Obtained of Any Permutation	Go	Medium
1588	Sum of All Odd Length Subarrays	Go	Easy
1587	Bank Account Summary II 🔒	MySQL	Easy
1586	Binary Search Tree Iterator II 🔒	Go	Medium
1585	Check If String Is Transformable With Substring Sort Operations	Go	Hard
1584	Min Cost to Connect All Points	Go	Medium
1583	Count Unhappy Friends	Go	Medium
1582	Special Positions in a Binary Matrix	Go	Easy
1581	Customer Who Visited but Did Not Make Any Transactions 🔒	MySQL	Easy
1580	Put Boxes Into the Warehouse II 🔒	Go	Medium
1579	Remove Max Number of Edges to Keep Graph Fully Traversable	Go	Hard
1578	Minimum Deletion Cost to Avoid Repeating Letters	Go	Medium
1577	Number of Ways Where Square of Number Is Equal to Product of Two Numbers	Go	Medium
1576	Replace All ?'s to Avoid Consecutive Repeating Characters	Go	Easy
1575	Count All Possible Routes	Go	Hard
1574	Shortest Subarray to be Removed to Make Array Sorted	Go	Medium
1573	Number of Ways to Split a String	Go	Medium
1572	Matrix Diagonal Sum	Go	Easy
1571	Warehouse Manager 🔒	MySQL	Easy
1570	Dot Product of Two Sparse Vectors 🔒	Go	Medium
1569	Number of Ways to Reorder Array to Get Same BST	Go	Hard
1568	Minimum Number of Days to Disconnect Island	Go	Hard
1567	Maximum Length of Subarray With Positive Product	Go	Medium
1566	Detect Pattern of Length M Repeated K or More Times	Go	Easy
1565	Unique Orders and Customers Per Month 🔒	MySQL	Easy
1564	Put Boxes Into the Warehouse I 🔒	Go	Medium
1563	Stone Game V	Go	Hard
1562	Find Latest Group of Size M	Go	Medium
1561	Maximum Number of Coins You Can Get	Go	Medium
1560	Most Visited Sector in a Circular Track	Go	Easy
1559	Detect Cycles in 2D Grid	Go	Hard
1558	Minimum Numbers of Function Calls to Make Target Array	Go	Medium
1557	Minimum Number of Vertices to Reach All Nodes	Go	Medium
1556	Thousand Separator	Go	Easy
1555	Bank Account Summary 🔒	MySQL	Medium
1554	Strings Differ by One Character 🔒	Go	Medium
1553	Minimum Number of Days to Eat N Oranges	Go	Hard
1552	Magnetic Force Between Two Balls	Go	Medium
1551	Minimum Operations to Make Array Equal	Go	Medium
1550	Three Consecutive Odds	Go	Easy
1549	The Most Recent Orders for Each Product 🔒	MySQL	Medium
1548	The Most Similar Path in a Graph 🔒	Go	Hard
1547	Minimum Cost to Cut a Stick	Go	Hard
1546	Maximum Number of Non-Overlapping Subarrays With Sum Equals Target	Go	Medium
1545	Find Kth Bit in Nth Binary String	Go	Medium
1544	Make The String Great	Go	Easy
1543	Fix Product Name Format 🔒	MySQL	Easy
1542	Find Longest Awesome Substring	Go	Hard
1541	Minimum Insertions to Balance a Parentheses String	Go	Medium
1540	Can Convert String in K Moves	Go	Medium
1539	Kth Missing Positive Number	Go	Easy
1538	Guess the Majority in a Hidden Array 🔒	Go	Medium
1537	Get the Maximum Score	Go	Hard
1536	Minimum Swaps to Arrange a Binary Grid	Go	Medium
1535	Find the Winner of an Array Game	Go	Medium
1534	Count Good Triplets	Go	Easy
1533	Find the Index of the Large Integer 🔒	Go	Medium
1532	The Most Recent Three Orders 🔒	MySQL	Medium
1531	String Compression II	Go	Hard
1530	Number of Good Leaf Nodes Pairs	Go	Medium
1529	Bulb Switcher IV	Go	Medium
1528	Shuffle String	Go	Easy
1527	Patients With a Condition 🔒	MySQL	Easy
1526	Minimum Number of Increments on Subarrays to Form a Target Array	Go	Hard
1525	Number of Good Ways to Split a String	Go	Medium
1524	Number of Sub-arrays With Odd Sum	Go	Medium
1523	Count Odd Numbers in an Interval Range	Go	Easy
1522	Diameter of N-Ary Tree 🔒	Go	Medium
1521	Find a Value of a Mysterious Function Closest to Target	Go	Hard
1520	Maximum Number of Non-Overlapping Substrings	Go	Hard
1519	Number of Nodes in the Sub-Tree With the Same Label	Go	Medium
1518	Water Bottles	Go	Easy
1517	Find Users With Valid E-Mails 🔒	MySQL	Easy
1516	Move Sub-Tree of N-Ary Tree 🔒	Go	Hard
1515	Best Position for a Service Centre	Go	Hard
1514	Path with Maximum Probability	Go	Medium
1513	Number of Substrings With Only 1s	Go	Medium
1512	Number of Good Pairs	Go	Easy
1511	Customer Order Frequency 🔒	MySQL	Easy
1510	Stone Game IV	Go	Hard
1509	Minimum Difference Between Largest and Smallest Value in Three Moves	Go	Medium
1508	Range Sum of Sorted Subarray Sums	Go	Medium
1507	Reformat Date	Go	Easy
1506	Find Root of N-Ary Tree 🔒	Go	Medium
1505	Minimum Possible Integer After at Most K Adjacent Swaps On Digits	Go	Hard
1504	Count Submatrices With All Ones	Go	Medium
1503	Last Moment Before All Ants Fall Out of a Plank	Go	Medium
1502	Can Make Arithmetic Progression From Sequence	Go	Easy
1501	Countries You Can Safely Invest In 🔒	MySQL	Medium

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