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Top 20 Problems on Dynamic programming

Top 10 Problems on Backtracking

Top 20 Problems on Graph

Top 25 Problems on Trees

All Problems

# Status Problem Level Completes Likes
71

Sort the two dimensional (2D) array - In-place

Medium % 0
72

Implement/Design the version control map system

Medium % 0
73

Given an array, count the number of pairs with a given sum.

Beginner % 0
74

Sort Map as per values - Java Program

Medium % 0
75

Two Sum Problem

Beginner % 0
76

Find if any two intervals overlap in given intervals

Medium % 0
77

Given an array, find the number of all pairs with odd sum.

Medium % 0
78

Given an array, find all unique subsets with a given sum with allowed repeated digits.

Medium % 0
80

Lexicographically next permutation With One swap

Medium % 1
81

Find all subsets of size K from a given number N (1 to N)

Medium % 0
82

Sum of distinct elements among two given sets

Beginner % 0
83

Find all possible combinations with sum K from a given number N(1 to N) with the repetition of numbers is allowed

Medium % 0
84

Stable Marriage Problem - Gale–Shapley Algorithm - Java

Hard % 0
85

Insert a node in the given sorted linked list.

Beginner % 1
86

Construct the largest number from the given array.

Medium % 0
87

Given an array, find three-element sum closest to Zero

Medium % 1
89

Given an array, print all unique subsets with a given sum.

Medium % 0
90

Sum of length of subsets which contains given value K and all elements in subsets are less than equal to K.

Medium % 0
91

Replace array elements with maximum element on the right.

Medium % 0
92

Find all unique combinations of numbers (from 1 to 9 ) with sum to N

Medium % 0
93

Number of Intervals in which given value lies

Beginner % 0
94

Activity Selection Problem

Medium % 0
95

Find the sum of overlapping elements in two sets

Beginner % 0
96

Given two coordinates, Print the line equation

Beginner % 0
97

Check if Graph is Bipartite - Adjacency List using Breadth-First Search(BFS)

Hard % 0
98

Numbers with prime set bits in a given range using Sieve of Eratosthenes Algorithm

Medium % 0
99

Check If Given Undirected Graph is a tree

Medium % 0
101

Depth-First Search (DFS) in 2D Matrix/2D-Array - Recursive Solution

Beginner % 1
102

Articulation Points OR Cut Vertices in a Graph

Hard % 0
103

Check the completeness of given binary tree | Set 2 - Using Level Order Traversal

Medium % 0
104

Find the number of distinct Islands OR connected components.

Hard % 0

Sort the two dimensional (2D) array - In-place

Implement/Design the version control map system

Given an array, count the number of pairs with a given sum.

Sort Map as per values - Java Program

Two Sum Problem

Find if any two intervals overlap in given intervals

Given an array, find the number of all pairs with odd sum.

Given an array, find all unique subsets with a given sum with allowed repeated digits.

Lexicographically next permutation With One swap

Find all subsets of size K from a given number N (1 to N)

Sum of distinct elements among two given sets

Find all possible combinations with sum K from a given number N(1 to N) with the repetition of numbers is allowed

Stable Marriage Problem - Gale–Shapley Algorithm - Java

Insert a node in the given sorted linked list.

Construct the largest number from the given array.

Given an array, find three-element sum closest to Zero

Given an array, print all unique subsets with a given sum.

Sum of length of subsets which contains given value K and all elements in subsets are less than equal to K.

Replace array elements with maximum element on the right.

Find all unique combinations of numbers (from 1 to 9 ) with sum to N

Number of Intervals in which given value lies

Activity Selection Problem

Find the sum of overlapping elements in two sets

Given two coordinates, Print the line equation

Check if Graph is Bipartite - Adjacency List using Breadth-First Search(BFS)

Numbers with prime set bits in a given range using Sieve of Eratosthenes Algorithm

Check If Given Undirected Graph is a tree

Depth-First Search (DFS) in 2D Matrix/2D-Array - Recursive Solution

Articulation Points OR Cut Vertices in a Graph

Check the completeness of given binary tree | Set 2 - Using Level Order Traversal

Find the number of distinct Islands OR connected components.