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]
[2101-2150]	[2151-2200]	[2201-2250]	[2251-2300]	[2301-2350]	[2351-2400]

#	Title	Solution	Difficulty
2173	Longest Winning Streak 🔒	MySQL	Hard
2172	Maximum AND Sum of Array	Go	Hard
2171	Removing Minimum Number of Magic Beans	Go	Medium
2170	Minimum Operations to Make the Array Alternating	Go	Medium
2169	Count Operations to Obtain Zero	Go	Easy
2168	Unique Substrings With Equal Digit Frequency 🔒	Go	Medium
2167	Minimum Time to Remove All Cars Containing Illegal Goods	Go	Hard
2166	Design Bitset	Go	Medium
2165	Smallest Value of the Rearranged Number	Go	Medium
2164	Sort Even and Odd Indices Independently	Go	Easy
2163	Minimum Difference in Sums After Removal of Elements	Go	Hard
2162	Minimum Cost to Set Cooking Time	Go	Medium
2161	Partition Array According to Given Pivot	Go	Medium
2160	Minimum Sum of Four Digit Number After Splitting Digits	Go	Easy
2159	Order Two Columns Independently 🔒	MySQL	Medium
2158	Amount of New Area Painted Each Day 🔒	Go	Hard
2157	Groups of Strings	Go	Hard
2156	Find Substring With Given Hash Value	Go	Hard
2155	All Divisions With the Highest Score of a Binary Array	Go	Medium
2154	Keep Multiplying Found Values by Two	Go	Easy
2153	The Number of Passengers in Each Bus II 🔒	MySQL	Hard
2152	Minimum Number of Lines to Cover Points 🔒	Go	Medium
2151	Maximum Good People Based on Statements	Go	Hard
2150	Find All Lonely Numbers in the Array	Go	Medium
2149	Rearrange Array Elements by Sign	Go	Medium
2148	Count Elements With Strictly Smaller and Greater Elements	Go	Easy
2147	Number of Ways to Divide a Long Corridor	Go	Hard
2146	K Highest Ranked Items Within a Price Range	Go	Medium
2145	Count the Hidden Sequences	Go	Medium
2144	Minimum Cost of Buying Candies With Discount	Go	Easy
2143	Choose Numbers From Two Arrays in Range 🔒	Go	Hard
2142	The Number of Passengers in Each Bus I 🔒	MySQL	Medium
2141	Maximum Running Time of N Computers	Go	Hard
2140	Solving Questions With Brainpower	Go	Medium
2139	Minimum Moves to Reach Target Score	Go	Medium
2138	Divide a String Into Groups of Size k	Go	Easy
2137	Pour Water Between Buckets to Make Water Levels Equal 🔒	Go	Medium
2136	Earliest Possible Day of Full Bloom	Go	Hard
2135	Count Words Obtained After Adding a Letter	Go	Medium
2134	Minimum Swaps to Group All 1's Together II	Go	Medium
2133	Check if Every Row and Column Contains All Numbers	Go	Easy
2132	Stamping the Grid	Go	Hard
2131	Longest Palindrome by Concatenating Two Letter Words	Go	Medium
2130	Maximum Twin Sum of a Linked List	Go	Medium
2129	Capitalize the Title	Go	Easy
2128	Remove All Ones With Row and Column Flips 🔒	Go	Medium
2127	Maximum Employees to Be Invited to a Meeting	Go	Hard
2126	Destroying Asteroids	Go	Medium
2125	Number of Laser Beams in a Bank	Go	Medium
2124	Check if All A's Appears Before All B's	Go	Easy
2123	Minimum Operations to Remove Adjacent Ones in Matrix 🔒	Go	Hard
2122	Recover the Original Array	Go	Hard
2121	Intervals Between Identical Elements	Go	Medium
2120	Execution of All Suffix Instructions Staying in a Grid	Go	Medium
2119	A Number After a Double Reversal	Go	Easy
2118	Build the Equation 🔒	MySQL	Hard
2117	Abbreviating the Product of a Range	Go	Hard
2116	Check if a Parentheses String Can Be Valid	Go	Medium
2115	Find All Possible Recipes from Given Supplies	Go	Medium
2114	Maximum Number of Words Found in Sentences	Go	Easy
2113	Elements in Array After Removing and Replacing Elements 🔒	Go	Medium
2112	The Airport With the Most Traffic 🔒	MySQL	Medium
2111	Minimum Operations to Make the Array K-Increasing	Go	Hard
2110	Number of Smooth Descent Periods of a Stock	Go	Medium
2109	Adding Spaces to a String	Go	Medium
2108	Find First Palindromic String in the Array	Go	Easy
2107	Number of Unique Flavors After Sharing K Candies 🔒	Go	Medium
2106	Maximum Fruits Harvested After at Most K Steps	Go	Hard
2105	Watering Plants II	Go	Medium
2104	Sum of Subarray Ranges	Go	Medium
2103	Rings and Rods	Go	Easy
2102	Sequentially Ordinal Rank Tracker	Go	Hard
2101	Detonate the Maximum Bombs	Go	Medium
2100	Find Good Days to Rob the Bank	Go	Medium
2099	Find Subsequence of Length K With the Largest Sum	Go	Easy
2098	Subsequence of Size K With the Largest Even Sum 🔒	Go	Medium
2097	Valid Arrangement of Pairs	Go	Hard
2096	Step-By-Step Directions From a Binary Tree Node to Another	Go	Medium
2095	Delete the Middle Node of a Linked List	Go	Medium
2094	Finding 3-Digit Even Numbers	Go	Easy
2093	Minimum Cost to Reach City With Discounts 🔒	Go	Medium
2092	Find All People With Secret	Go	Hard
2091	Removing Minimum and Maximum From Array	Go	Medium
2090	K Radius Subarray Averages	Go	Medium
2089	Find Target Indices After Sorting Array	Go	Easy
2088	Count Fertile Pyramids in a Land	Go	Hard
2087	Minimum Cost Homecoming of a Robot in a Grid	Go	Medium
2086	Minimum Number of Buckets Required to Collect Rainwater from Houses	Go	Medium
2085	Count Common Words With One Occurrence	Go	Easy
2084	Drop Type 1 Orders for Customers With Type 0 Orders 🔒	MySQL	Medium
2083	Substrings That Begin and End With the Same Letter 🔒	Go	Medium
2082	The Number of Rich Customers 🔒	MySQL	Easy
2081	Sum of k-Mirror Numbers	Go	Hard
2080	Range Frequency Queries	Go	Medium
2079	Watering Plants	Go	Medium
2078	Two Furthest Houses With Different Colors	Go	Easy
2077	Paths in Maze That Lead to Same Room 🔒	Go	Medium
2076	Process Restricted Friend Requests	Go	Hard
2075	Decode the Slanted Ciphertext	Go	Medium
2074	Reverse Nodes in Even Length Groups	Go	Medium
2073	Time Needed to Buy Tickets	Go	Easy
2072	The Winner University 🔒	MySQL	Easy
2071	Maximum Number of Tasks You Can Assign	Go	Hard
2070	Most Beautiful Item for Each Query	Go	Medium
2069	Walking Robot Simulation II	Go	Medium
2068	Check Whether Two Strings are Almost Equivalent	Go	Easy
2067	Number of Equal Count Substrings 🔒	Go	Medium
2066	Account Balance 🔒	MySQL	Medium
2065	Maximum Path Quality of a Graph	Go	Hard
2064	Minimized Maximum of Products Distributed to Any Store	Go	Medium
2063	Vowels of All Substrings	Go	Medium
2062	Count Vowel Substrings of a String	Go	Easy
2061	Number of Spaces Cleaning Robot Cleaned 🔒	Go	Medium
2060	Check if an Original String Exists Given Two Encoded Strings	Go	Hard
2059	Minimum Operations to Convert Number	Go	Medium
2058	Find the Minimum and Maximum Number of Nodes Between Critical Points	Go	Medium
2057	Smallest Index With Equal Value	Go	Easy
2056	Number of Valid Move Combinations On Chessboard	Go	Hard
2055	Plates Between Candles	Go	Medium
2054	Two Best Non-Overlapping Events	Go	Medium
2053	Kth Distinct String in an Array	Go	Easy
2052	Minimum Cost to Separate Sentence Into Rows 🔒	Go	Medium
2051	The Category of Each Member in the Store 🔒	MySQL	Medium
2050	Parallel Courses III	Go	Hard
2049	Count Nodes With the Highest Score	Go	Medium
2048	Next Greater Numerically Balanced Number	Go	Medium
2047	Number of Valid Words in a Sentence	Go	Easy
2046	Sort Linked List Already Sorted Using Absolute Values 🔒	Go	Medium
2045	Second Minimum Time to Reach Destination	Go	Hard
2044	Count Number of Maximum Bitwise-OR Subsets	Go	Medium
2043	Simple Bank System	Go	Medium
2042	Check if Numbers Are Ascending in a Sentence	Go	Easy
2041	Accepted Candidates From the Interviews 🔒	MySQL	Medium
2040	Kth Smallest Product of Two Sorted Arrays	Go	Hard
2039	The Time When the Network Becomes Idle	Go	Medium
2038	Remove Colored Pieces if Both Neighbors are the Same Color	Go	Medium
2037	Minimum Number of Moves to Seat Everyone	Go	Easy
2036	Maximum Alternating Subarray Sum 🔒	Go	Medium
2035	Partition Array Into Two Arrays to Minimize Sum Difference	Go	Hard
2034	Stock Price Fluctuation	Go	Medium
2033	Minimum Operations to Make a Uni-Value Grid	Go	Medium
2032	Two Out of Three	Go	Easy
2031	Count Subarrays With More Ones Than Zeros 🔒	Go	Medium
2030	Smallest K-Length Subsequence With Occurrences of a Letter	Go	Hard
2029	Stone Game IX	Go	Medium
2028	Find Missing Observations	Go	Medium
2027	Minimum Moves to Convert String	Go	Easy
2026	Low-Quality Problems 🔒	MySQL	Easy
2025	Maximum Number of Ways to Partition an Array	Go	Hard
2024	Maximize the Confusion of an Exam	Go	Medium
2023	Number of Pairs of Strings With Concatenation Equal to Target	Go	Medium
2022	Convert 1D Array Into 2D Array	Go	Easy
2021	Brightest Position on Street 🔒	Go	Medium
2020	Number of Accounts That Did Not Stream 🔒	MySQL	Medium
2019	The Score of Students Solving Math Expression	Go	Hard
2018	Check if Word Can Be Placed In Crossword	Go	Medium
2017	Grid Game	Go	Medium
2016	Maximum Difference Between Increasing Elements	Go	Easy
2015	Average Height of Buildings in Each Segment 🔒	Go	Medium
2014	Longest Subsequence Repeated k Times	Go	Hard
2013	Detect Squares	Go	Medium
2012	Sum of Beauty in the Array	Go	Medium
2011	Final Value of Variable After Performing Operations	Go	Easy
2010	The Number of Seniors and Juniors to Join the Company II 🔒	MySQL	Hard
2009	Minimum Number of Operations to Make Array Continuous	Go	Hard
2008	Maximum Earnings From Taxi	Go	Medium
2007	Find Original Array From Doubled Array	Go	Medium
2006	Count Number of Pairs With Absolute Difference K	Go	Easy
2005	Subtree Removal Game with Fibonacci Tree 🔒	Go	Hard
2004	The Number of Seniors and Juniors to Join the Company 🔒	MySQL	Hard
2003	Smallest Missing Genetic Value in Each Subtree	Go	Hard
2002	Maximum Product of the Length of Two Palindromic Subsequences	Go	Medium
2001	Number of Pairs of Interchangeable Rectangles	Go	Medium
2000	Reverse Prefix of Word	Go	Easy
1999	Smallest Greater Multiple Made of Two Digits 🔒	Go	Medium
1998	GCD Sort of an Array	Go	Hard
1997	First Day Where You Have Been in All the Rooms	Go	Medium
1996	The Number of Weak Characters in the Game	Go	Medium
1995	Count Special Quadruplets	Go	Easy
1994	The Number of Good Subsets	Go	Hard
1993	Operations on Tree	Go	Medium
1992	Find All Groups of Farmland	Go	Medium
1991	Find the Middle Index in Array	Go	Easy
1990	Count the Number of Experiments 🔒	MySQL	Medium
1989	Maximum Number of People That Can Be Caught in Tag 🔒	Go	Medium
1988	Find Cutoff Score for Each School 🔒	MySQL	Medium
1987	Number of Unique Good Subsequences	Go	Hard
1986	Minimum Number of Work Sessions to Finish the Tasks	Go	Medium
1985	Find the Kth Largest Integer in the Array	Go	Medium
1984	Minimum Difference Between Highest and Lowest of K Scores	Go	Easy
1983	Widest Pair of Indices With Equal Range Sum 🔒	Go	Medium
1982	Find Array Given Subset Sums	Go	Hard
1981	Minimize the Difference Between Target and Chosen Elements	Go	Medium
1980	Find Unique Binary String	Go	Medium
1979	Find Greatest Common Divisor of Array	Go	Easy
1978	Employees Whose Manager Left the Company 🔒	MySQL	Easy
1977	Number of Ways to Separate Numbers	Go	Hard
1976	Number of Ways to Arrive at Destination	Go	Medium
1975	Maximum Matrix Sum	Go	Medium
1974	Minimum Time to Type Word Using Special Typewriter	Go	Easy
1973	Count Nodes Equal to Sum of Descendants 🔒	Go	Medium
1972	First and Last Call On the Same Day 🔒	MySQL	Hard
1971	Find if Path Exists in Graph	Go	Easy
1970	Last Day Where You Can Still Cross	Go	Hard
1969	Minimum Non-Zero Product of the Array Elements	Go	Medium
1968	Array With Elements Not Equal to Average of Neighbors	Go	Medium
1967	Number of Strings That Appear as Substrings in Word	Go	Easy
1966	Binary Searchable Numbers in an Unsorted Array 🔒	Go	Medium
1965	Employees With Missing Information 🔒	MySQL	Easy
1964	Find the Longest Valid Obstacle Course at Each Position	Go	Hard
1963	Minimum Number of Swaps to Make the String Balanced	Go	Medium
1962	Remove Stones to Minimize the Total	Go	Medium
1961	Check If String Is a Prefix of Array	Go	Easy
1960	Maximum Product of the Length of Two Palindromic Substrings	Go	Hard
1959	Minimum Total Space Wasted With K Resizing Operations	Go	Medium
1958	Check if Move is Legal	Go	Medium
1957	Delete Characters to Make Fancy String	Go	Easy
1956	Minimum Time For K Virus Variants to Spread 🔒	Go	Hard
1955	Count Number of Special Subsequences	Go	Hard
1954	Minimum Garden Perimeter to Collect Enough Apples	Go	Medium
1953	Maximum Number of Weeks for Which You Can Work	Go	Medium
1952	Three Divisors	Go	Easy
1951	All the Pairs With the Maximum Number of Common Followers 🔒	MySQL	Medium
1950	Maximum of Minimum Values in All Subarrays 🔒	Go	Medium
1949	Strong Friendship 🔒	MySQL	Medium
1948	Delete Duplicate Folders in System	Go	Hard
1947	Maximum Compatibility Score Sum	Go	Medium
1946	Largest Number After Mutating Substring	Go	Medium
1945	Sum of Digits of String After Convert	Go	Easy
1944	Number of Visible People in a Queue	Go	Hard
1943	Describe the Painting	Go	Medium
1942	The Number of the Smallest Unoccupied Chair	Go	Medium
1941	Check if All Characters Have Equal Number of Occurrences	Go	Easy
1940	Longest Common Subsequence Between Sorted Arrays 🔒	Go	Medium
1939	Users That Actively Request Confirmation Messages 🔒	MySQL	Easy
1938	Maximum Genetic Difference Query	Go	Hard
1937	Maximum Number of Points with Cost	Go	Medium
1936	Add Minimum Number of Rungs	Go	Medium
1935	Maximum Number of Words You Can Type	Go	Easy
1934	Confirmation Rate 🔒	MySQL	Medium
1933	Check if String Is Decomposable Into Value-Equal Substrings 🔒	Go	Easy
1932	Merge BSTs to Create Single BST	Go	Hard
1931	Painting a Grid With Three Different Colors	Go	Hard
1930	Unique Length-3 Palindromic Subsequences	Go	Medium
1929	Concatenation of Array	Go	Easy
1928	Minimum Cost to Reach Destination in Time	Go	Hard
1927	Sum Game	Go	Medium
1926	Nearest Exit from Entrance in Maze	Go	Medium
1925	Count Square Sum Triples	Go	Easy
1924	Erect the Fence II 🔒	Go	Hard
1923	Longest Common Subpath	Go	Hard
1922	Count Good Numbers	Go	Medium
1921	Eliminate Maximum Number of Monsters	Go	Medium
1920	Build Array from Permutation	Go	Easy
1919	Leetcodify Similar Friends 🔒	MySQL	Hard
1918	Kth Smallest Subarray Sum 🔒	Go	Medium
1917	Leetcodify Friends Recommendations 🔒	MySQL	Hard
1916	Count Ways to Build Rooms in an Ant Colony	Go	Hard
1915	Number of Wonderful Substrings	Go	Medium
1914	Cyclically Rotating a Grid	Go	Medium
1913	Maximum Product Difference Between Two Pairs	Go	Easy
1912	Design Movie Rental System	Go	Hard
1911	Maximum Alternating Subsequence Sum	Go	Medium
1910	Remove All Occurrences of a Substring	Go	Medium
1909	Remove One Element to Make the Array Strictly Increasing	Go	Easy
1908	Game of Nim 🔒	Go	Medium
1907	Count Salary Categories 🔒	MySQL	Medium
1906	Minimum Absolute Difference Queries	Go	Medium
1905	Count Sub Islands	Go	Medium
1904	The Number of Full Rounds You Have Played	Go	Medium
1903	Largest Odd Number in String	Go	Easy
1902	Depth of BST Given Insertion Order 🔒	Go	Medium
1901	Find a Peak Element II	Go	Medium
1900	The Earliest and Latest Rounds Where Players Compete	Go	Hard
1899	Merge Triplets to Form Target Triplet	Go	Medium
1898	Maximum Number of Removable Characters	Go	Medium
1897	Redistribute Characters to Make All Strings Equal	Go	Easy
1896	Minimum Cost to Change the Final Value of Expression	Go	Hard
1895	Largest Magic Square	Go	Medium
1894	Find the Student that Will Replace the Chalk	Go	Medium
1893	Check if All the Integers in a Range Are Covered	Go	Easy
1892	Page Recommendations II 🔒	MySQL	Hard
1891	Cutting Ribbons 🔒	Go	Medium
1890	The Latest Login in 2020 🔒	MySQL	Easy
1889	Minimum Space Wasted From Packaging	Go	Hard
1888	Minimum Number of Flips to Make the Binary String Alternating	Go	Medium
1887	Reduction Operations to Make the Array Elements Equal	Go	Medium
1886	Determine Whether Matrix Can Be Obtained By Rotation	Go	Easy
1885	Count Pairs in Two Arrays 🔒	Go	Medium
1884	Egg Drop With 2 Eggs and N Floors	Go	Medium
1883	Minimum Skips to Arrive at Meeting On Time	Go	Hard
1882	Process Tasks Using Servers	Go	Medium
1881	Maximum Value after Insertion	Go	Medium
1880	Check if Word Equals Summation of Two Words	Go	Easy
1879	Minimum XOR Sum of Two Arrays	Go	Hard
1878	Get Biggest Three Rhombus Sums in a Grid	Go	Medium
1877	Minimize Maximum Pair Sum in Array	Go	Medium
1876	Substrings of Size Three with Distinct Characters	Go	Easy
1875	Group Employees of the Same Salary 🔒	MySQL	Medium
1874	Minimize Product Sum of Two Arrays 🔒	Go	Medium
1873	Calculate Special Bonus 🔒	MySQL	Easy
1872	Stone Game VIII	Go	Hard
1871	Jump Game VII	Go	Medium
1870	Minimum Speed to Arrive on Time	Go	Medium
1869	Longer Contiguous Segments of Ones than Zeros	Go	Easy
1868	Product of Two Run-Length Encoded Arrays 🔒	Go	Medium
1867	Orders With Maximum Quantity Above Average 🔒	MySQL	Medium
1866	Number of Ways to Rearrange Sticks With K Sticks Visible	Go	Hard
1865	Finding Pairs With a Certain Sum	Go	Medium
1864	Minimum Number of Swaps to Make the Binary String Alternating	Go	Medium
1863	Sum of All Subset XOR Totals	Go	Easy
1862	Sum of Floored Pairs	Go	Hard
1861	Rotating the Box	Go	Medium
1860	Incremental Memory Leak	Go	Medium
1859	Sorting the Sentence	Go	Easy
1858	Longest Word With All Prefixes 🔒	Go	Medium
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