Problems

# Status Problem Level Completes Likes
36

Check if Arithmetic Expression contains duplicate parenthesis

Medium % 0
37

Determine the order of Tests when tests have dependencies on each other

Medium % 0
38

Find the maximum number present in a String

Beginner % 0
39

Convert Prefix to Postfix Expression

Medium % 0
40

Convert Roman Number to Integer

Beginner % 0
41

Convert Postfix to Prefix Expression

Medium % 0
42

String to Integer (AtoI - ASCII to Integer) - Recursive Solution

Medium % 0
43

Grouping of Anagrams

Medium % 0
45

Longest contiguous character in a given String - O(N) Solution

Beginner % 0
46

Convert Postfix to Infix Expression

Medium % 0
47

String to Integer (AtoI - ASCII to Integer)

Beginner % 0
48

Longest substring with at most two unique characters

Medium % 0
49

Monotone Increasing Digits

Medium % 0
50

Convert Infix to Prefix Expression

Medium % 0
51

Find duplicates Characters in the given String

Beginner % 0
52

Max Flow Problem - Ford-Fulkerson Algorithm

Hard % 0
53

Sum of all Unique elements in a given array

Beginner % 0
54

Convert Infix to Postfix Expression

Medium % 0
55

Find three smallest elements in a given array

Beginner % 0
56

Evaluation of Infix expressions

Medium % 0
57

Convert Prefix to Infix Expression

Medium % 0
58

Least Recently Used (LRU) Cache – Using LinkedHashSet and Deque | Set 2

Hard % 0
59

Merge K sorted Linked List - Using Priority Queue

Hard % 0
60

Count Set bits in a given Number

Beginner % 0
61

Check if array contains all unique or distinct numbers.

Beginner % 0
62

Product of all Unique elements in a given array.

Beginner % 0
63

Valid Multiple Parentheses

Medium % 0
64

Check if given number is perfect square - O(√N) Solution

Beginner % 0
65

Find first three largest elements in a given array

Beginner % 0
66

Find the nearest building which has bike | Find nearest specific vertex from source in a graph.

Hard % 0
67

Valid Brackets – Part 2 | Stack Method

Beginner % 0
68

Find two smallest elements in a given array

Beginner % 0
69

Find Number of reverse pairs in an array

Medium % 0
70

Find first two largest elements in a given array

Beginner % 0

Check if Arithmetic Expression contains duplicate parenthesis

Determine the order of Tests when tests have dependencies on each other

Find the maximum number present in a String

Convert Prefix to Postfix Expression

Convert Roman Number to Integer

Convert Postfix to Prefix Expression

String to Integer (AtoI - ASCII to Integer) - Recursive Solution

Grouping of Anagrams

Longest contiguous character in a given String - O(N) Solution

Convert Postfix to Infix Expression

String to Integer (AtoI - ASCII to Integer)

Longest substring with at most two unique characters

Monotone Increasing Digits

Convert Infix to Prefix Expression

Find duplicates Characters in the given String

Max Flow Problem - Ford-Fulkerson Algorithm

Sum of all Unique elements in a given array

Convert Infix to Postfix Expression

Find three smallest elements in a given array

Evaluation of Infix expressions

Convert Prefix to Infix Expression

Least Recently Used (LRU) Cache – Using LinkedHashSet and Deque | Set 2

Merge K sorted Linked List - Using Priority Queue

Count Set bits in a given Number

Check if array contains all unique or distinct numbers.

Product of all Unique elements in a given array.

Valid Multiple Parentheses

Check if given number is perfect square - O(√N) Solution

Find first three largest elements in a given array

Find the nearest building which has bike | Find nearest specific vertex from source in a graph.

Valid Brackets – Part 2 | Stack Method

Find two smallest elements in a given array

Find Number of reverse pairs in an array

Find first two largest elements in a given array