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September 2026 Problems

Select any day to explore the LeetCode daily coding challenge solution.

01

Day 01

Minimum Moves to Clean the Classroom
Medium 02

Day 02

Construct Uniform Parity Array I
Easy 03

Day 03

Construct Uniform Parity Array II
Medium 04

Day 04

Smallest Stable Index I
Easy 05

Day 05

Smallest Stable Index II
Medium 06

Day 06

Distinct Subsequences
Hard 07

Day 07

Distinct Subsequences II
Hard 08

Day 08

Count Commas in Range
Easy 09

Day 09

Count Commas in Range II
Medium 10

Day 10

Count Nodes Equal to Average of Subtree
Medium 11

Day 11

Unique 3-Digit Even Numbers
Easy 12

Day 12

Maximum Score of Non-overlapping Intervals
Hard 13

Day 13

Image Overlap
Medium 14

Day 14

Rectangle Overlap
Easy 15

Day 15

Maximum Number of Non-overlapping Palindrome Substrings
Hard 16

Day 16

Number of Sets of K Non-Overlapping Line Segments
Medium 17

Day 17

Find Two Non-overlapping Sub-arrays Each With Target Sum
Medium 18

Day 18

Maximum Number of Non-Overlapping Substrings
Hard 19

Day 19

Circle and Rectangle Overlapping
Medium 20

Day 20

Reverse Degree of a String
Easy 21

Day 21

Find X Value of Array I
Medium 22

Day 22

Find X Value of Array II
Hard 23

Day 23

Minimum Operations to Reduce X to Zero
Medium 24

Day 24

Smallest Index With Digit Sum Equal to Index
Easy 25

Day 25

Brace Expansion II
Hard 26

Day 26

Evaluate the Bracket Pairs of a String
Medium 27

Day 27

Reverse Substrings Between Each Pair of Parentheses
Medium 28

Day 28

Maximum Nesting Depth of the Parentheses
Easy 29

Day 29

Check if There Is a Valid Parentheses String Path
Hard 30

Day 30

Maximum Nesting Depth of Two Valid Parentheses Strings
Medium