Alexandr
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Activity Heat Map
Learning Paths (3)
Practice Paths (2)
Contests (105)
June Challenge 2017
A Good Set, Chef and the Feast, Xenny and Coin Rankings
July Challenge 2017
Chef and Sign Sequences, Whats in the Name, Calculator
August Long Challenge 2017
Chef and Rainbow Array, Palindromic Game, Greedy Candidates
October Challenge 2017
Chef and a great voluntary Program, Chef and Cycled Cycles, Max Mex, Counter Test For CHEFSUM, A Balanced Contest
November Challenge 2017
Chef Hates Palindromes, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
December Challenge 2017
Chef and Universe, Santa Delivering Problem, Chef And his Cake, Penalty Shoot-out, Chef and Hamming Distance of arrays
June Cook-Off 2017
Ada and crayons
August Cook-Off 2017
From heaven to earth
September Cook-Off 2017
Subsequence Equality
November Cook-Off 2017
Online Chess, Random Pair
December Cook-Off 2017
Football Match
June Lunchtime 2017
Maximum Unique Segment, Two Numbers
July Lunchtime 2017
Find the Maximum Value
August Lunchtime 2017
Mathison and pangrams
September Lunchtime 2017
Chef and Cook-Off Contests
October Lunchtime 2017
Buggy Calculator
November Lunchtime 2017
Smart Strategy
December Lunchtime 2017
Days in Month
January Cook-Off 2018
Multiple of 3, Survive in ChocoLand
February Challenge 2018
Chef And His Characters, Chef And The Patents, Car-pal Tunnel, (Challenge) Biased Committee, Permutation and Palindrome
March Challenge 2018 DIV 2
Chef and Easy Problem, A Big Sale, Mix the Colors, Chef and Glove, Minion Chef and Bananas
July Cook-Off 2018 Division 2
Encoding Message, OR Matrix
November Cook-Off 2018 Division 2
Truth and Dare, Beautiful Garland
March Lunchtime 2018 Division 2 (Unrated)
Partitions, Chef and Friends, Three Integers, Magic Elements
April Lunchtime 2018 Division 2
Two vs Ten
April Challenge 2018 Division 2
Chef and Array (Challenge), Weight of Numbers, Highway Crossing, Count Good Prefixes, Average of Pairs, Workers
June Challenge 2018 Division 2
Binary Shuffle
July Challenge 2018 Division 2
No Minimum No Maximum, Magic Set, Strike or Spare
August Challenge 2018 Division 2
Modular GCD, Problem Sort, Sheokand and Number, Spell Bob
September Challenge 2018 Division 2
Magician versus Chef, War of XORs, Chef and Condition Zero (Challenge), Chef and Adventures, Bad Shuffle
December Challenge 2018 Division 2
Max and Electrical Panel, Chef and Interactive XOR, Chef and Interactive Contests, Chef and An Ideal Problem
October Challenge 2018 Division 2
Minimize Digitsum, (Challenge) Chef and Takonemo, Chef and Serves, Byte to Bit
September Lunchtime 2018 Division 2
Opposite Cites
Code Melange (Rated)
CPI Crisis, The Deadly Sin, Candy Love
January Challenge 2019 Division 2
Yet Another Problem About Sequences, Different Neighbours, Lucky Number Game, Distinct Pairs, Chef and Modulo Game, Fancy Quotes
January Cook-Off 2019 Division 2
Ada School, Ada King
February Challenge 2019 Division 2
Manhattan Rectangle, Guess It Right, Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, (Challenge) Chef with Orchestra in the Kitchen, Art of Balance, Deputy Chef
March Challenge 2019 Division 2
Chef got Recipes, Chef and Number Game, Yet Again a Subarray Problem, Chef and a Beautiful Digit
May Challenge 2019 Division 2
Ada Rooks 2, Matches
June Challenge 2019 Division 2
Road Signs, Chef and Proxy, Guddu on a Date, Chef and Ingredients, Sum and GCD
June Cook-Off 2019 Division 2
Multiple Choice Exam, Eat Twice, Drink Slush
July Challenge 2019 Division 2
Parity Again
August Challenge 2019 Division 2
Dilemma, Football, Distribute Apples, Zombie and the Caves
August Cook-Off 2019 Division 2
Chef and Pepperoni Pizza, Chef Drinks Coke
October Challenge 2019 Division 2
Even Edges, Missing Number, Chef and Maximum Star Value, Array Modification, Operations on a Matrix, Phone Prices
November Challenge 2019 Division 2
Hard Sequence, From Zero to Infinity, Weapon Value
December Challenge 2019 Division 2
Chefina and Ranges, Plus Multiply, Binary XOR, Easy Subsequence Selection, That Is My Score!, Addition
Dementia 2019 (Rated for Division 2)
When to take medicine
January Challenge 2020 Division 2
Chef and Dynamo, Doraemon, Doofish Matrix, Equality, Breaking Bricks
February Challenge 2020 Division 1
No Change Required, Long Contest and Cook Off Overlaps
March Cook-Off 2020 Division 1
Mysterious Sequence
January Lunchtime 2020 Division 1
Under the Tunnels
August Challenge 2020 Division 2
Smallest KMP
September Challenge 2020 Division 2
Chefina and Swap, Chef and Trump Cards, Find XOR, Coronavirus Spread 2
October Challenge 2020 Division 2
Positive AND, Replace for X, Covid Run, Chef and Easy Queries
December Challenge 2020 Division 2
Hail XOR, Positive Prefixes, Even Pair Sum, Vaccine Production, Vaccine Distribution
February Challenge 2021 Division 2
Frog Sort, Team Name, Prime Game
June Challenge 2021 Division 3 (Rated)
Minimum Dual Area, Shortest Route, Bitwise Tuples, Bella ciao, Summer Heat
SnackDown 2021 - Online Qualifiers
Lucky Number, Maximum Number Of Distinct Elements
October Challenge 2021 Division 3 (Rated)
Longest AND Subarray, Digit Removal, MEX-OR, Three Boxes, Which Mixture
SnackDown 2021 - Online Round 1A
Round Robin Ranks , Min Max LCM
SnackDown 2021 - Online Round 1B
Queens Placement , Help Nishant
February Long 2022 - I, Division 2 (Unrated)
Bitwise Blend
February Long 2022 - II, Division 2 (Unrated)
Bitwise swaps
Starters 36 Division 2 (Rated)
Buying Sweets, Reduce to 1, Presents for Cheffina
April Long Two 2022 Division 2 (Unrated)
Geometric Mean Inequality
May Cook-Off 2022 Division 2 (Rated)
Doubled Distances
May Long One 2022 Division 2 (Unrated)
The Magical Stone, Alternating Diameter
July Long One 2022 Division 3 (Rated)
Largest Square in the garden, Journey of the Knight, Game of Piles Version 1, Game of Piles Version 2, Find A, B, C, Slow Solution, Pass the Exam, Chef and Candies
Starters 46 Division 2 (Rated)
Prime Xor, Array sorting
Starters 75 Division 2 (Rated)
Equal Hamming Distance
Starters 76 Division 2 (Rated)
Make Array Odd, Zero String, Construct Array, Not Divisible
Starters 77 Division 3 (Rated)
Spreading Charges, Tekken, Concat Palindrome, Three Numbers
Starters 81 Division 2 (Unrated)
Distinct Matrix
Starters 86 Division 2 (Rated)
String Game , Maximise Score
Starters 87 Division 2 (Rated)
Inversions of subsequences, Existence, AB plus C
Starters 88 Division 2 (Rated)
Chef and Asteroids, Unstable Subarray
Starters 89 Division 2 (Rated)
Plus 2 or Minus 1, Positive or Negative Subarrays, Subarray Removal
Starters 93 Division 2 (Rated)
Break Free, Problem
Starters 107 Division 2 (Rated)
Rock Paper Scissor, OR Permutation
Starters 109 Division 2 (Rated)
Minimum XOR, Best of N Sets
Starters 110 Divison 3 (Rated)
Water Park, Airlines, Marbles, Am I Lucky!
Starters 112 Division 3 (Rated)
Fair Share Settlement, 3 Logicians Walk into a Bar, Max Nutrition
Starters 113 Division 3 (Rated)
Maximum Score , Sum Neq , Make N Zero
Starters 115 Division 3 (Rated)
Greedy LIS Algorithm, A PLUS B Remastered, Decorating Christmas Tree, Chocolate Distribution
Starters 118 Division 3 (Rated)
Subset GCD, Literacy Rate, Join States, Xorry 2, Xorry 1
Starters 119 Division 3 (Rated)
Judged, Cookie Day, Another Good String , K Odd Sum
Starters 122 Division 3 (Rated)
Problem Reviews, Arya In Grid, Transformation Cost, Man of the Match
Starters 123 Division 2 (Rated)
Maximise Adjacent Sum, Check Adjacent Sum, Minimum And Maximum I, Minimum And Maximum II
Starters 125 Division 3 (Rated)
Bucket Game, 50-50 Rule, Fake Certificate, Binary Minimal
Starters 127 Division 2
ABC Conjecture, Superincreasing, Anti-Triangle
Starters 128 Division 2 (Rated)
XOR And Multiply, MEXimize the Array, Disjoint Non-Decreasing Array
Starters 132 Division 2 (Rated)
ALIEN-OR, GAME 11
Starters 139 Division 2 (Rated)
Sum of N, Maximum Distance Permutations
Starters 149 (Rated)
Easy Subarray Sum, Maximise Sum, Chef Loves Beautiful Strings (Easy Version)
Starters 154 (Rated)
GCD and XOR, Add 1 or 2 Game
Starters 155 (Rated)
GCD to 1 (Easy), GCD to 1 (Hard), Replace With First
Starters 158 (Rated)
Largest Subsequence
Starters 159 (Rated)
Super Hero, Chess Colouring, Elections
Starters 165 (Rated)
A to B, Bulk Discount