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Learning Paths (14)
Web development using JavaScript
Learn JavaScript
Recursion
Learn Java
Time complexity
DBMS course
Dynamic programming
Learn Advanced SQL
Learn SQL
Number theory
C++ STL - Standard template library
Greedy Algorithms
Completed
Binary Search
Problem solving in Python
Practice Paths (9)
1800 to 2000 difficulty problems
Jump from 2* to 3*
2000 to 2500 difficulty problems
1600 to 1800 difficulty problems
Projects using HTML / CSS
1400 to 1600 difficulty problems
SQL case studies
Level up from 1* to 2*
Completed
Data Structures Interview Questions
Contests (107)
Starters 51 Division 4 (Rated)
Final Population, TV Discount
August Long 2022 Division 4 (Rated)
Sale Season, Maximum Submissions, Make A and B equal
Starters 56 Division 4 (Rated)
Nearest Exit, Chefland Games
Starters 59 Division 4 (Rated)
Audible Range, Speciality
Starters 61 Division 4 (Rated)
Reach on Time, Odd Sum Pair
Starters 64 Division 4 (Rated)
Distinct Colors, Water Consumption
Starters 65 Division 4 (Rated)
Parity, Candies, Hackerman
Starters 66 Division 4 (Rated)
Binary Battles, Squats, Monopoly in Chefland
Starters 67 Division 4 (Rated)
Minimum Number of Ones, Tour of King
Starters 69 Division 4 (Rated)
Rain in Chefland, Scalene Triangle, Convert to permutation
Starters 71 Division 4 (Rated)
Instagram, Perfect Trio
Starters 72 Division 4 (Rated)
Indivisible, Sum it
Starters 73 Division 4 (Rated)
Chef Plays Ludo, Multivitamin Tablets, Lucky Numbers, Append for OR
Starters 74 Division 4 (Rated)
Facebook, Mana Points, Odd Even Binary String
Starters 75 Division 4 (Rated)
Two Ranges, Saving Taxes, Profit Increment
January Long 2023 Division 4 (Rated)
Far from origin, Overspeeding Fine, Negative Product
Starters 76 Division 4 (Rated)
Redistributing Chocolates, Read Pages, Zero String, 400M Race
February Cook-Off 2023 Division 4 (Rated)
Battery Health, Bi_lindrome!, Permutation and Modulus, Netflix
Starters 77 Division 4 (Rated)
Tekken, Tom and Jerry Chase, Codechef Airlines
Starters 78 Division 4 (Rated)
Passing Marks, Candy Store, Good Turn
Starters 79 Division 4 (Rated)
Add smallest prime factor, Distinct Opposite Sums, Better Deal, Ageing
Starters 80 Division 4 (Rated)
Just One More Episode, Single-use Attack, Running Comparison
Starters 81 Division 4 (Unrated)
Divide Pages, Maximum Capacity, Sunny Day
Starters 82 Division 4 (Rated)
Reach Home, MIN To MAX, Candy Division
Starters 84 Division 4 (Rated)
Chef and Donation, Elections in Chefland, Max Binary
Starters 85 Division 4 (Rated)
Efficient PAN Linking, Inside The Stadium, IPL Ticket Rush, Can Chef
Starters 86 Division 4 (Rated)
Cricket Match, Chef and Battery , CodeChef Learn Problem Solving
Starters 87 Division 4 (Rated)
Four Tickets, Buy Ten Packets, Return the Change, Existence
Starters 83 Division 4 (Rated)
Chef Eren, Budget of Technex, Couple Game
Starters 88 Division 4 (Rated)
Masterchef finals, Online or Offline, Largest and Second Largest
Starters 90 Division 4 (Rated)
Learning SQL, Printing Binary Array, Favourite Numbers
Starters 91 Division 4 (Rated)
Odd GCD Permutation, Blobby Volley Scores, Bus Seat Numbering, Parking Charges
Starters 93 Division 4 (Rated)
Right There, 7 Rings, Problem
Starters 94 Division 4 (Rated)
The Gift, Gymkhana Election IIIT-A, CodeChef Streak, Possible or Not
Starters 95 Division 3 (Rated)
Alt-Tab, Transfusion Chain
Starters 96 Division 4 (Rated)
Remove Multiples, Bells of Pilgrimage, Weeding, AB Difference
Starters 97 Division 3 (Rated)
Caesar Cipher, Best of Two
Starters 98 Division 3 (Rated)
FIND A and B, Airport Management, Ball Distribution
Starters 99 Division 3 (Rated)
Endless Appetizers
Starters 100 Division 4 (Rated)
Air Quality Index, Trade Surplus, Chocolate Distribution
Starters 101 Division 3 (Rated)
Work Smarter, Not Harder
Starters 102 Division 3 (Rated)
Selling Insurance, Chef and Stocks
Starters 103 Division 4 (Rated)
Sunday Brunch, October Marathon, Dice Number
Starters 104 Division 4 (Rated)
Santa and Chocolates, Pizza Cutting, Double Rent, GCD and LCM
Starters 105 Division 3 (Rated)
Dracula Eats, Take it Easy, Dull Operation
Starters 106 Division 3 (Rated)
Chef Fantasy 11, Playing with OR
Starters 107 Division 3 (Rated)
Rock Paper Scissor, Pending Assignments, OR Permutation
Starters 108 Division 3 (Rated)
Palindromic Prime Numbers, Chess Pairing
Starters 109 Division 3 (Rated)
Minimum XOR, Best of N Sets, Worth of a Video
Starters 110 Divison 3 (Rated)
Water Park, Airlines, Marbles, Am I Lucky!
Starters 111 Divison 3 (Rated)
Reach Codetown, Exams
Starters 112 Division 3 (Rated)
Cursed Indices, Fair Share Settlement, 3 Logicians Walk into a Bar, Max Nutrition
Starters 114 Division 3 (Rated)
Painting Walls, Christmas Candy
Starters 115 Division 3 (Rated)
Greedy LIS Algorithm, A PLUS B Remastered, Decorating Christmas Tree, Chocolate Distribution
Starters 116 Division 3 (Rated)
Hattrick, ORST , Access Control
Starters 117 Division 3 (Rated)
Not Prime Permutation, Weapon Choice, Spell Shortening
Starters 118 Division 3 (Rated)
Subset GCD, Literacy Rate, Join States, Xorry 1
Starters 119 Division 3 (Rated)
Judged, Cookie Day, Another Good String , K Odd Sum
Starters 120 Division 3 (Rated)
Largest K, Sub or Swp, Valentine Gifts
Starters 121 Division 3 (Rated)
Caesar Cipher Lite, Anti Adjacent Swaps, The Man Code
Starters 122 Division 3 (Rated)
Problem Reviews, Arya In Grid, Man of the Match
Starters 123 Division 3 (Rated)
Room Allocation, Maximise Adjacent Sum, Minimum And Maximum I, Minimum And Maximum II
Starters 124 Division 3 (Rated)
Binary Parity, Table Strength, Cricket Tournament
Starters 125 Division 3 (Rated)
Bucket Game, 50-50 Rule, Fake Certificate, Binary Minimal
Starters 126 Division 3 (Rated)
Dice Game 3, Sale, Permutation Disturbance
Starters 127 Division 3
Superincreasing, Extreme Basketball, Anti-Triangle
Starters 128 Division 3 (Rated)
Moody Chef, MEXimize the Array, Disjoint Non-Decreasing Array
Starters 129 Division 2 (Rated)
Palindromic Substrings, Ballon d Or
Starters 130 Division 2 (Rated)
Make Equal, Alternating Binary String, Good Binary String
Starters 131 Division 2 (Rated)
Dice Deception
Starters 132 Division 2 (Rated)
ALIEN-OR, GAME 11
Starters 137 Division 2 (Rated)
Large Differences
Starters 138 Division 2 (Rated)
Prefix Suffix Inequality, Long Drive, Distinct Substring
Starters 140 Division 3 (Rated)
Make Permutation, Split Permutation, Trick Or Treat, Yoga Class
Starters 141 Division 3 (Rated)
Redundant Array
Starters 142 Division 3 (Rated)
Chef loves Pizza Chef loves halfs, Penalty Shoot-out, Array Removal, Number Hunt
Starters 143 Division 3 (Rated)
Non-Divisor Array, Maximum Coins
Starters 144 Division 3 (Rated)
Budget Allotment, Largest K, Savings Account
Starters 145 Division 3 (Rated)
Make Bob Win , Gun Master, Make My Array Equal
Starters 147 Division 3 (Rated till 5 stars)
Truth Teller And Liars 101, Independence Day 101, Non-Primes 101, Gold Coins 101
Starters 148 Division 2 (Rated)
FightBots
Starters 149 (Rated)
Easy Subarray Sum, Maximise Sum, Chef Loves Beautiful Strings (Easy Version)
Starters 150 (Rated)
Find Multiset State, Equal Pairs (Easy)
Starters 151 (rated)
Ball Game, Convert string
Starters 153 (Rated)
Butterfly, Another Game
Starters 154 (Rated)
Add 1 or 2 Game
Starters 156 (Rated)
Partition Score, Even Numbers Hate
Starters 157 (Rated)
Small, Smaller, Smallest, Not-too-far Replacement
Starters 158 (Rated)
XOR Smaller
Starters 159 (Rated)
Random Nim, Elections, Card Game
Starters 160 (Rated)
Too Many Oranges, Equate S and T
Starters 161 (Rated)
Selling Donuts, Two Cards
Starters 162 (Rated)
Adjacent Sum Array, Permutation Mod K, Assignment Score
Starters 163 (Rated)
Nice Array, Minimum Types
Starters 164 (Rated)
Halloween Array, Swap and Flip
Starters 165 (Rated)
Reverse and Alternate, Stable Array, Bulk Discount
Starters 166 (Rated)
Distinct Power, Chefland Library
Starters 167 (Rated)
Delete Not Equal
Starters 168 (Rated)
No Two Alike, Binary Removals, Make Odd, Big Achiever
Starters 170 (Rated)
Crazy Jumping Frogs, qUiRkY qUesTs (Easy), Monster Monster
Starters 171 (Rated)
Swish Game, White Wall
Starters 172 (Rated)
Streak Star
Starters 173 (Rated upto < 2700)
Cool Subsequences, Time Penalty
Starters 175 (Rated)
Technex Tickets
Starters 177 (Rated)
Ordered Distances, Triangle Checking, 2 Boxes
Starters 178 (Rated)
Placing 01 And 10, Permutation Construct
Starters 179 (Rated)
Lost in the Fest!!, Unlock The Safe