1900–1999

Problems in this range: 100

• 1900. The Earliest and Latest Rounds Where Players Compete
• 1901. Find a Peak Element II
• 1902. Depth of BST Given Insertion Order 🔒
• 1903. Largest Odd Number in String
• 1904. The Number of Full Rounds You Have Played
• 1905. Count Sub Islands
• 1906. Minimum Absolute Difference Queries
• 1907. Count Salary Categories
• 1908. Game of Nim 🔒
• 1909. Remove One Element to Make the Array Strictly Increasing
• 1910. Remove All Occurrences of a Substring
• 1911. Maximum Alternating Subsequence Sum
• 1912. Design Movie Rental System
• 1913. Maximum Product Difference Between Two Pairs
• 1914. Cyclically Rotating a Grid
• 1915. Number of Wonderful Substrings
• 1916. Count Ways to Build Rooms in an Ant Colony
• 1917. Leetcodify Friends Recommendations 🔒
• 1918. Kth Smallest Subarray Sum 🔒
• 1919. Leetcodify Similar Friends 🔒
• 1920. Build Array from Permutation
• 1921. Eliminate Maximum Number of Monsters
• 1922. Count Good Numbers
• 1923. Longest Common Subpath
• 1924. Erect the Fence II 🔒
• 1925. Count Square Sum Triples
• 1926. Nearest Exit from Entrance in Maze
• 1927. Sum Game
• 1928. Minimum Cost to Reach Destination in Time
• 1929. Concatenation of Array
• 1930. Unique Length-3 Palindromic Subsequences
• 1931. Painting a Grid With Three Different Colors
• 1932. Merge BSTs to Create Single BST
• 1933. Check if String Is Decomposable Into Value-Equal Substrings 🔒
• 1934. Confirmation Rate
• 1935. Maximum Number of Words You Can Type
• 1936. Add Minimum Number of Rungs
• 1937. Maximum Number of Points with Cost
• 1938. Maximum Genetic Difference Query
• 1939. Users That Actively Request Confirmation Messages 🔒
• 1940. Longest Common Subsequence Between Sorted Arrays 🔒
• 1941. Check if All Characters Have Equal Number of Occurrences
• 1942. The Number of the Smallest Unoccupied Chair
• 1943. Describe the Painting
• 1944. Number of Visible People in a Queue
• 1945. Sum of Digits of String After Convert
• 1946. Largest Number After Mutating Substring
• 1947. Maximum Compatibility Score Sum
• 1948. Delete Duplicate Folders in System
• 1949. Strong Friendship 🔒
• 1950. Maximum of Minimum Values in All Subarrays 🔒
• 1951. All the Pairs With the Maximum Number of Common Followers 🔒
• 1952. Three Divisors
• 1953. Maximum Number of Weeks for Which You Can Work
• 1954. Minimum Garden Perimeter to Collect Enough Apples
• 1955. Count Number of Special Subsequences
• 1956. Minimum Time For K Virus Variants to Spread 🔒
• 1957. Delete Characters to Make Fancy String
• 1958. Check if Move is Legal
• 1959. Minimum Total Space Wasted With K Resizing Operations
• 1960. Maximum Product of the Length of Two Palindromic Substrings
• 1961. Check If String Is a Prefix of Array
• 1962. Remove Stones to Minimize the Total
• 1963. Minimum Number of Swaps to Make the String Balanced
• 1964. Find the Longest Valid Obstacle Course at Each Position
• 1965. Employees With Missing Information
• 1966. Binary Searchable Numbers in an Unsorted Array 🔒
• 1967. Number of Strings That Appear as Substrings in Word
• 1968. Array With Elements Not Equal to Average of Neighbors
• 1969. Minimum Non-Zero Product of the Array Elements
• 1970. Last Day Where You Can Still Cross
• 1971. Find if Path Exists in Graph
• 1972. First and Last Call On the Same Day 🔒
• 1973. Count Nodes Equal to Sum of Descendants 🔒
• 1974. Minimum Time to Type Word Using Special Typewriter
• 1975. Maximum Matrix Sum
• 1976. Number of Ways to Arrive at Destination
• 1977. Number of Ways to Separate Numbers
• 1978. Employees Whose Manager Left the Company
• 1979. Find Greatest Common Divisor of Array
• 1980. Find Unique Binary String
• 1981. Minimize the Difference Between Target and Chosen Elements
• 1982. Find Array Given Subset Sums
• 1983. Widest Pair of Indices With Equal Range Sum 🔒
• 1984. Minimum Difference Between Highest and Lowest of K Scores
• 1985. Find the Kth Largest Integer in the Array
• 1986. Minimum Number of Work Sessions to Finish the Tasks
• 1987. Number of Unique Good Subsequences
• 1988. Find Cutoff Score for Each School 🔒
• 1989. Maximum Number of People That Can Be Caught in Tag 🔒
• 1990. Count the Number of Experiments 🔒
• 1991. Find the Middle Index in Array
• 1992. Find All Groups of Farmland
• 1993. Operations on Tree
• 1994. The Number of Good Subsets
• 1995. Count Special Quadruplets
• 1996. The Number of Weak Characters in the Game
• 1997. First Day Where You Have Been in All the Rooms
• 1998. GCD Sort of an Array
• 1999. Smallest Greater Multiple Made of Two Digits 🔒