Ozon

14 questions tracked14 with solutions

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Frequency scoreSorted highest → lowest frequency✓ Our Solution = we have a detailed walkthrough

Showing 14 of 14 questions

EasyValid Parentheses✓ Our Solution

100

StringStack

MediumMerge Intervals✓ Our Solution

ArraySorting

EasySquares of a Sorted Array✓ Our Solution

ArrayTwo PointersSorting

EasyMonotonic Array✓ Our Solution

Array

HardDepartment Top Three Salaries✓ Our Solution

Database

ArrayHash Table

ArrayTwo Pointers

EasyReverse Linked List✓ Our Solution

Linked ListRecursion

EasyFirst Unique Character in a String✓ Our Solution

Hash TableStringQueueCounting

EasyInvert Binary Tree✓ Our Solution

TreeDepth-First SearchBreadth-First SearchBinary Tree

EasyBest Time to Buy and Sell Stock✓ Our Solution

ArrayDynamic Programming

MediumDecode String✓ Our Solution

StringStackRecursion

MediumDepartment Highest Salary✓ Our Solution

Database

MediumLongest Substring Without Repeating Characters✓ Our Solution

Hash TableStringSliding Window