686 problems · Solve with AI-powered hints & explanations
| # | Title | Difficulty |
|---|---|---|
| 1771 | Maximize Palindrome Length From Subsequences | Hard |
| 1776 | Car Fleet II | Hard |
| 1782 | Count Pairs Of Nodes |
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| Hard |
| 1787 | Make the XOR of All Segments Equal to Zero | Hard |
| 1793 | Maximum Score of a Good Subarray | Hard |
| 1799 | Maximize Score After N Operations | Hard |
| 1803 | Count Pairs With XOR in a Range | Hard |
| 1808 | Maximize Number of Nice Divisors | Hard |
| 1815 | Maximum Number of Groups Getting Fresh Donuts | Hard |
| 1819 | Number of Different Subsequences GCDs | Hard |
| 1825 | Finding MK Average | Hard |
| 1830 | Minimum Number of Operations to Make String Sorted | Hard |
| 1835 | Find XOR Sum of All Pairs Bitwise AND | Hard |
| 1840 | Maximum Building Height | Hard |
| 1847 | Closest Room | Hard |
| 1851 | Minimum Interval to Include Each Query | Hard |
| 1857 | Largest Color Value in a Directed Graph | Hard |
| 1862 | Sum of Floored Pairs | Hard |
| 1866 | Number of Ways to Rearrange Sticks With K Sticks Visible | Hard |
| 1872 | Stone Game VIII | Hard |
| 1879 | Minimum XOR Sum of Two Arrays | Hard |
| 1883 | Minimum Skips to Arrive at Meeting On Time | Hard |
| 1889 | Minimum Space Wasted From Packaging | Hard |
| 1896 | Minimum Cost to Change the Final Value of Expression | Hard |
| 1900 | The Earliest and Latest Rounds Where Players Compete | Hard |
| 1912 | Design Movie Rental System | Hard |
| 1916 | Count Ways to Build Rooms in an Ant Colony | Hard |
| 1923 | Longest Common Subpath | Hard |
| 1928 | Minimum Cost to Reach Destination in Time | Hard |
| 1931 | Painting a Grid With Three Different Colors | Hard |
| 1932 | Merge BSTs to Create Single BST | Hard |
| 1938 | Maximum Genetic Difference Query | Hard |
| 1944 | Number of Visible People in a Queue | Hard |
| 1948 | Delete Duplicate Folders in System | Hard |
| 1955 | Count Number of Special Subsequences | Hard |
| 1960 | Maximum Product of the Length of Two Palindromic Substrings | Hard |
| 1964 | Find the Longest Valid Obstacle Course at Each Position | Hard |
| 1970 | Last Day Where You Can Still Cross | Hard |
| 1977 | Number of Ways to Separate Numbers | Hard |
| 1982 | Find Array Given Subset Sums | Hard |
| 1987 | Number of Unique Good Subsequences | Hard |
| 1994 | The Number of Good Subsets | Hard |
| 1998 | GCD Sort of an Array | Hard |
| 2003 | Smallest Missing Genetic Value in Each Subtree | Hard |
| 2009 | Minimum Number of Operations to Make Array Continuous | Hard |
| 2014 | Longest Subsequence Repeated k Times | Hard |
| 2019 | The Score of Students Solving Math Expression | Hard |
| 2025 | Maximum Number of Ways to Partition an Array | Hard |
| 2030 | Smallest K-Length Subsequence With Occurrences of a Letter | Hard |
| 2035 | Partition Array Into Two Arrays to Minimize Sum Difference | Hard |
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