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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
351

Count the number of nodes in a given binary tree

Beginner % 0
352

Sieve of Eratosthenes - Find all Prime Numbers less than equal to N | Set 2

Medium % 0
353

Collatz Conjecture - Steps to transform Number to 1

Beginner % 0
354

Find all Prime Numbers less than equal to N | Set 1

Beginner % 0
355

Monotone Increasing Digits

Medium % 1
356

Find third largest element in a given array

Beginner % 0
357

Max Flow Problem - Ford-Fulkerson Algorithm

Hard % 0
358

Sum of all Unique elements in a given array

Beginner % 0
359

Java program to find the largest element in array

Beginner % 0
360

Find three smallest elements in a given array

Beginner % 0
361

Convert Prefix to Infix Expression

Medium % 0
362

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

Hard % 0
363

Check if array contains all unique or distinct numbers.

Beginner % 0
364

Product of all Unique elements in a given array.

Beginner % 0
365

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

Beginner % 0
366

Find first three largest elements in a given array

Beginner % 0
367

Selection Sort – Java Implementation

Beginner % 0
369

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

Hard % 0
370

Find the roots of Quadratic Equation – Java Program

Beginner % 0
371

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

Medium % 0
372

Find two smallest elements in a given array

Beginner % 0
373

Front and Back Search in an Array

Beginner % 0
375

Find first two largest elements in a given array

Beginner % 0
376

Calculate Logn base r – Java Implementation

Beginner % 0
377

Max Flow Problem – Introduction

Hard % 0
378

Dijkstra Algorithm Implementation – TreeSet and Pair Class

Hard % 0
379

Java Program to find Sum the elements of an Array

Beginner % 0
380

Insertion Sort – Java Implementation

Beginner % 0
381

Rotate the given array in cycles

Beginner % 0
382

Heap Sort – Java Implementation

Medium % 0
384

Find the Area and Perimeter of Rectangle – Java Program

Beginner % 0
385

Stack Data Structure – Introduction and Implementation

Beginner % 0

Count the number of nodes in a given binary tree

Sieve of Eratosthenes - Find all Prime Numbers less than equal to N | Set 2

Collatz Conjecture - Steps to transform Number to 1

Find all Prime Numbers less than equal to N | Set 1

Monotone Increasing Digits

Find third largest element in a given array

Max Flow Problem - Ford-Fulkerson Algorithm

Sum of all Unique elements in a given array

Java program to find the largest element in array

Find three smallest elements in a given array

Convert Prefix to Infix Expression

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

Check if array contains all unique or distinct numbers.

Product of all Unique elements in a given array.

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

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.

Find the roots of Quadratic Equation – Java Program

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

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

Insertion Sort – Java Implementation

Rotate the given array in cycles

Heap Sort – Java Implementation

Find the Area and Perimeter of Rectangle – Java Program

Stack Data Structure – Introduction and Implementation