Akash Kumar Sinha

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PROBLEM SOLVING

Problems

Contest Solved

Codeforces

Leetcode

GeeksforGeeks

Problems Solved

Reorder Routes to Make All Paths Lead to the City Zero

Search Insert Position

Delete and Earn

Maximum Subarray

Find Minimum in Rotated Sorted Array

Remove Duplicates from Sorted Array

Reverse an Array

Steps by Knight

Merge Sorted Array

Longest Palindromic Subsequence

Longest Common Subsequence

Best Time to Buy and Sell Stock - III

Best Time to Buy and Sell Stock - II

Best Time to Buy and Sell Stock

Longest Arithmetic Subsequence

Minimum Swaps to Make Sequences Increasing

Find if Path Exists in Graph

House Robber II

N-th Tribonacci Number

Min Cost Climbing Stairs

Climbing Stairs

Pizza With 3n Slices

Maximum Height by Stacking Cuboids

Longest Increasing Subsequence

Aggressive Cows

Allocate Minimum Number of Pages

0-1 Knapsack Problem

Reducing Dishes

Minimum Sideway Jumps

Minimum Score Triangulation of Polygon

Search in Rotated Sorted Array

Minimum Cost For Tickets

Perfect Squares

Combination Sum IV

Number of Occurrence

Painting the Fence

Dearrangement of Balls

Peak Index in a Mountain Array

Find First and Last Position of Element in Sorted Array

Minimum Cost to Cut a Stick

Find the Duplicate Number

Complement of Base 10 Integer

Reverse Integer

Min Cost Climbing Stairs

Binary Tree Inorder Traversal

Invert Binary Tree

Maximum Depth of Binary Tree

Merge Two Sorted Lists

Linked List Cycle

Middle of the Linked List

Reverse Linked List

Design Linked List

Maximum Twin Sum of a Linked List

Odd Even Linked List

Delete the Middle Node of a Linked List

Number of Intersecting Interval Pairs I

Number of Intersecting Interval Pairs II

Doremy's Paint 3

The Third Three Number Problem

Game with Integers

Asteroid Collision

Removing Stars From a String

Equal Row and Column Pairs

Determine if Two Strings Are Close

Unique Number of Occurrences

Find the Difference of Two Arrays

Find Pivot Index

Find the Highest Altitude

Longest Subarray of 1's After Deleting One Element

Max Consecutive Ones III

Maximum Number of Vowels in a Substring of Given Length

Maximum Average Subarray I

Rumb Needs a Hand

0-1 Knapsack Problem

Count Values With Equally Spaced Occurrences I

Count Values With Equally Spaced Occurrences II

Max Number of K-Sum Pairs

Container With Most Water

String Compression

Increasing Triplet Subsequence

Product of Array Except Self

Vertical Order Traversal of a Binary Tree

Reverse Words in a String

Reverse Vowels of a String

Can Place Flowers

Kids With the Greatest Number of Candies

Greatest Common Divisor of Strings

Merge Strings Alternately

Swap the Numbers

Number of Recent Calls

Reverse Linked List

Maximum Depth of Binary Tree

Leaf Similar Trees

Search in a Binary Search Tree

Guess Number Higher or Lower

N-th Tribonacci Number

Min Cost Climbing Stairs

Max Number of K-Sum Pairs

Check ASCII Palindromic

Increasing Triplet Subsequence

Container With Most Water

Longest Cycle in a Graph

Number of Islands

Rotting Oranges

Island Perimeter

Maximum Product of Three Numbers

Asteroid Collision

Boundary Traversal of Binary Tree

Zigzag Tree Traversal

Detect Cycle in a Directed Graph (dfs)

Detect Cycle in an Undirected Graph (bfs)

Removing Stars From a String

Largest Integer With Given Digit Sum

Maximum Product of Two Digits

Find Eventual Safe States

Find the Difference of Two Arrays

Find Pivot Index

Find the Highest Altitude

Smallest Palindromic Rearrangement I

Count Leaves in a Binary Tree

Height of Binary Tree

Diameter of Binary Tree

Balanced Binary Tree

Reverse Vowels of a String

Reverse Words in a String

Maximum Number of Balloons

Climbing Stairs

Detect Cycle in an Undirected Graph (dfs)

Even Number of Knight Moves

Reorder Routes to Make All Paths Lead to the City Zero

Find Minimum in Rotated Sorted Array

Search in Rotated Sorted Array

Greatest Common Divisor of Strings

Can Place Flowers

Merge Strings Alternately

Contains Duplicate

Product of Array Except Self

Maximum Subarray

Maximum Subarray Sum With Length Divisible by K

Find if Path Exists in Graph

Note. Some questions may appear multiple times as part of deliberate practice and spaced repetition to reinforce core problem-solving patterns. Hover over a question to see its repetition count.