Problems

# Status Problem Level Completes Likes
176

Sum of all Unique elements in a given array

Beginner % 0
177

Java program to find the largest element in array

Beginner % 0
178

Convert Infix to Postfix Expression

Medium % 0
179

Find three smallest elements in a given array

Beginner % 0
180

Evaluation of Infix expressions

Medium % 0
181

Stack Java Class - Explained

Beginner % 0
182

Convert Prefix to Infix Expression

Medium % 0
183

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

Hard % 0
184

Merge K sorted Linked List - Using Priority Queue

Hard % 0
185

Infix, Postfix and Prefix Notations/Expressions

Beginner % 0
186

Count Set bits in a given Number

Beginner % 0
187

Check if array contains all unique or distinct numbers.

Beginner % 0
188

Product of all Unique elements in a given array.

Beginner % 0
189

Valid Multiple Parentheses

Medium % 0
190

Reverse a given number – Java Code

Beginner % 0
191

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

Beginner % 0
192

Least Recently Used (LRU) Cache – Using HashMap and Doubly Linked List | Set 1

Hard % 0
193

Find first three largest elements in a given array

Beginner % 0
194

Selection Sort – Java Implementation

Beginner % 0
196

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

Hard % 0
197

Valid Brackets – Part 2 | Stack Method

Beginner % 0
198

Find the roots of Quadratic Equation – Java Program

Beginner % 0
199

Given two strings validate the output string

Beginner % 0
200

Generate all the strings of length n from 0 to k-1.

Medium % 0
201

Find two smallest elements in a given array

Beginner % 0
202

Front and Back Search in an Array

Beginner % 0
204

Multiply with power of 2 without using pow() or * operator

Beginner % 0
205

Find Number of reverse pairs in an array

Medium % 0
206

Find first two largest elements in a given array

Beginner % 0
207

Calculate Logn base r – Java Implementation

Beginner % 0
208

Max Flow Problem – Introduction

Hard % 0
209

Dijkstra Algorithm Implementation – TreeSet and Pair Class

Hard % 0
210

Java Program to find Sum the elements of an Array

Beginner % 0

Sum of all Unique elements in a given array

Java program to find the largest element in array

Convert Infix to Postfix Expression

Find three smallest elements in a given array

Evaluation of Infix expressions

Stack Java Class - Explained

Convert Prefix to Infix Expression

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

Merge K sorted Linked List - Using Priority Queue

Infix, Postfix and Prefix Notations/Expressions

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

Reverse a given number – Java Code

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

Least Recently Used (LRU) Cache – Using HashMap and Doubly Linked List | Set 1

Find first three largest elements in a given array

Selection Sort – Java Implementation

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

Valid Brackets – Part 2 | Stack Method

Find the roots of Quadratic Equation – Java Program

Given two strings validate the output string

Generate all the strings of length n from 0 to k-1.

Find two smallest elements in a given array

Front and Back Search in an Array

Multiply with power of 2 without using pow() or * operator

Find Number of reverse pairs in an array

Find first two largest elements in a given array

Calculate Logn base r – Java Implementation

Max Flow Problem – Introduction

Dijkstra Algorithm Implementation – TreeSet and Pair Class

Java Program to find Sum the elements of an Array