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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
491

Colorful Numbers

Hard % 0
492

Goldbach's Conjecture

Beginner % 0
493

Convert Decimal into Irreducible Fraction

Beginner % 0
494

Track the Maximum Element in a Stack.

Medium % 0
495

Counting Sort

Medium % 0
496

Towers Of Hanoi

Beginner % 0
497

Sort 3 Integers without using if condition OR use only Max() function.

Beginner % 0
498

Euclidean algorithm - Greatest Common Divisor(GCD)

Beginner % 0
499

Implement Queue Using Stacks

Medium % 0
500

Alternate Splitting of a given Linked List

Medium % 0
501

Merge Sort in a Linked list

Medium % 0
502

AVL Tree - Insertion

Hard % 0
503

Check if Array Contains All Elements Of Some Given Range

Medium % 0
504

Check if Array is Consecutive Integers

Beginner % 0
505

Find the subarray with sum to a Given Value.

Medium % 0
506

In an Array, find the Smallest Subarray with Sum Greater than the Given Value

Medium % 0
507

Find intersection between Two Sorted Arrays.

Beginner % 0
508

Find Kth Smallest or Largest element in an Array.

Medium % 0
509

Given an array arrA[], find the maximum j – i such that arr[j] > arr[i].

Medium % 0
510

Search an Element in a Rotated Sorted Array

Medium % 0
513

Given a binary tree, Find the Maximum Path Sum between Any Two Leaves

Medium % 0
515

Sort an Given Array in the order defined by another array

Medium % 0
516

Sort an Array - odd numbers appear first in ascending order followed by the even numbers in descending order.

Medium % 0
518

Find the maximum width of a binary tree

Medium % 0
519

Find the number of occurrences of a number in a given sorted array.

Medium % 0
520

Find all common numbers in given three sorted arrays.

Beginner % 0
521

Find the first repeated element in an array by its index

Medium % 0
522

Minimum number that cannot be formed by any subset of an array

Beginner % 0
523

Find the Size of the Binary Tree

Beginner % 0
524

Given two binary trees, check if one binary tree is a subtree of another

Medium % 0

Colorful Numbers

Goldbach's Conjecture

Convert Decimal into Irreducible Fraction

Track the Maximum Element in a Stack.

Counting Sort

Towers Of Hanoi

Sort 3 Integers without using if condition OR use only Max() function.

Euclidean algorithm - Greatest Common Divisor(GCD)

Implement Queue Using Stacks

Alternate Splitting of a given Linked List

Merge Sort in a Linked list

AVL Tree - Insertion

Check if Array Contains All Elements Of Some Given Range

Check if Array is Consecutive Integers

Find the subarray with sum to a Given Value.

In an Array, find the Smallest Subarray with Sum Greater than the Given Value

Find intersection between Two Sorted Arrays.

Find Kth Smallest or Largest element in an Array.

Given an array arrA[], find the maximum j – i such that arr[j] > arr[i].

Search an Element in a Rotated Sorted Array

Given a binary tree, Find the Maximum Path Sum between Any Two Leaves

Sort an Given Array in the order defined by another array

Sort an Array - odd numbers appear first in ascending order followed by the even numbers in descending order.

Find the maximum width of a binary tree

Find the number of occurrences of a number in a given sorted array.

Find all common numbers in given three sorted arrays.

Find the first repeated element in an array by its index

Minimum number that cannot be formed by any subset of an array

Find the Size of the Binary Tree

Given two binary trees, check if one binary tree is a subtree of another