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Ozon Problems
Master the most frequently asked interview questions for this company.
ID
Title
Difficulty
Topics
20
Valid Parentheses
Easy
String
Stack
56
Merge Intervals
Medium
Array
Sorting
977
Squares of a Sorted Array
Easy
Array
Two Pointers
896
Monotonic Array
Easy
Array
185
Department Top Three Salaries
Hard
Database
1
Two Sum
Easy
Array
Hash Table
283
Move Zeroes
Easy
Array
Two Pointers
206
Reverse Linked List
Easy
Linked List
Recursion
387
First Unique Character in a String
Easy
Hash Table
String
226
Invert Binary Tree
Easy
Tree
Depth-First Search
121
Best Time to Buy and Sell Stock
Easy
Array
Dynamic Programming
394
Decode String
Medium
String
Stack
184
Department Highest Salary
Medium
Database
3
Longest Substring Without Repeating Characters
Medium
Hash Table
String
