🧩

DSA Problem Sheets

Data Structures & Algorithms

📋 70 Problems● Easy 33● Medium 32● Hard 5
Difficulty:AllEasy33Medium32Hard5
Topic:AllArrayPrefix SumHashingHash TableSliding WindowMathDynamic ProgrammingTwo PointerGreedyDequeSortingTwo Pointers
Showing 7 of 70 problems · Prefix Sum
#
Title
Difficulty
21
Two Sum
Hard
33
Cumulative Sum of an Array
Easy
34
Answer a Range Sum Query on an Array
Easy
35
Find the Equilibrium Index of an Array
Easy
36
Longest Subarray With Sum Equal to K
Medium
37
Count Subarrays Summing to K
Medium
38
Product of All Elements Except Self
Medium