| Contest | Problem |
|---|---|
| LTIME83 | MEXUM |
| COOK119 | BANQUNT |
| PRDRAW |
Jubayer Nirjhor
- nirjhor
Bangladesh- Student
- University of Dhaka
- No Active Plan. View Details
Activity Heat Map
Learning Paths (0)
Practice Paths (1)
Contests (148)
January Lunchtime 2015
Piece of cake
February Challenge 2015
Chef and Chain, Chef and Equality
March Challenge 2015
Chef and Notebooks
June Challenge 2015
Chef and Memory Limit
August Challenge 2015
Cooking Machine
September Challenge 2015
Count Steps in Matrix
October Challenge 2015
Time measure, Count Subarrays, Who dares to be a millionaire, Spheres, Rupsa and Equilateral Triangle
November Challenge 2015
Eugene and function, Chef and cakes
December Challenge 2015
Chef and the stones, Plane Division, Oracle Devu and Longest Common Subsequence
June Cook-Off 2015
Strange operations
November Cook-Off 2015
Sereja and Line, Sereja and Array and Subtracting
December Cook-Off 2015
Chef and Subarrays
February Lunchtime 2015
Lucky Four
October Lunchtime 2015
emitL
December Lunchtime 2015
Distinct Codes
January Long Challenge 2016
Rupsa and the Game, Churu and Balls, Chef and Time Machine, Devu and Perfume
February Challenge 2016
Chef and Strange Operations, Devu and a light discussion, Chef-Detective
March Challenge 2016
Palindromic substrings, maximize the sum
April Challenge 2016
Help Watson Escape, Fibonacci Queries, Chef and Ballons, Devu and good strings, Chef And Magical Path, Chef And Coloring
May Challenge 2016
Chef and Balls, Forest Gathering, Chef and Big Soccer, Laddu
June Challenge 2016
Chef And The Hiring Event, Chef and Array and K, Chef And Binary Operation, Chef and Coins Game, Devu and an Array
July Challenge 2016
Andrash and Stipendium, Chef and Tetris, Chefland and Electricity
August Challenge 2016
Chef and Chocolate, Chef and Round Run
September Challenge 2016
Chef and Friends, Dividing Machine, Chef and Matrix Division, Chef and digits of a number, Faded Palindromes, JosephLand, Chef and calculation
October Challenge 2016
Sereja and Stones, Chef and Keyboard, Big Queries, Fenwick Iterations, Chef and Three Dogs, Power Sums, Chef and Two String
November Challenge 2016
Count Permutations, Friends Meeting, Urban Development, Gift and Chef, Chef and squares, Task for Alexey
December Challenge 2016
Train Partner, Kirito in labyrinth, Our Base is Under Attack
January Cook-Off 2016
Chef and Fruits
February Cook-Off 2016
Puppy and Catchers, Puppy and Board, Puppy and Sum
March Cook-Off 2016
Digital clock, Dual Nim, Alternating subarray prefix
April Cook-Off 2016
Movie Weekend, Odd Divisors, Queries on a Binary Tree
May Cook-Off 2016
Phantasialand
June Cook-Off 2016
Sticks, Right Triangle
October Cook-Off 2016
Sherlock and the Ugly Flower, Watson asks Does Permutation Exist, ChefWatson uses Social Network
November Cook-Off 2016
Sebi and the highway
February Lunchtime 2016
Chef and Socks, Chef and Tic-Tac-Toe
March Lunchtime 2016
Simple Statistics, ABABAABA
April Lunchtime 2016
Coins And Triangle
May Lunchtime 2016
Akhil Recovers The Lost Array, Akhil And Colored Balls, Akhil And Random String
June Lunchtime 2016
Collisions, One more weird game
July Lunchtime 2016
Drumpf for President!, Lumpy - The Bus Driver
September Lunchtime 2016
Chef and Inequality, Chef and Triangles
October Lunchtime 2016
The Largest Bouquet
January Challenge 2017
Digits Cannot Separate
February Challenge 2017
Eugene and big number, Chef and Triangles, Chef and his Best Friend, Chef and His Apartment Dues
April Challenge 2017
Chef and Digits, Bear and Random Grid, Chef and Divisor Tree, Stable market, Dish Of Life, Bear and Row 01, Bear and Clique Distances, Similar Dishes
May Challenge 2017
Chef and Sub Array , Chef and his daily routine, Courses in an university, Blocked websites, Median of adjacent maximum numbers, Chef and Subsequences
June Challenge 2017
Chef and Prime Queries, Euler Sum, A Good Set, Cloning, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets
July Challenge 2017
Chef and Sign Sequences, Pishty and tree, Tree Expectancy, Whats in the Name, Calculator , IPC Trainers
August Long Challenge 2017
Chef and Rainbow Array, Chef And Fibonacci Array, Chef and Mover, Palindromic Game, Greedy Candidates, Strings and Graphs
September Challenge 2017
Sereja and Commands, Chef and Pick Digit, Minimum Good Permutation, Weasel does Xor on Tree, Fill The Matrix, Little Chef and Sums
November Challenge 2017
Chef and Intersection Line, Product on the segment by modulo , Chef Hates Palindromes, Polynomials, Chef and Subarray Queries, Chef goes Left Right Left, Lovers Gift, Periodic Palindrome Construction, Villages and Tribes
March Cook-Off 2017
Rainbow Graph, Yet Another Card Game, Safe Robot
May Cook-Off 2017
La Liga, Balanced Array, Nasty Queries
June Cook-Off 2017
Ada and crayons, SnackUp, Centeroid
August Cook-Off 2017
Real obtuse, From heaven to earth
October Cook-Off 2017
Chef and Counting Test, Chef and Employment Test, Chef and Weird Queries
May Lunchtime 2017
Prefix Inversions
June Lunchtime 2017
Maximum Unique Segment, Two Numbers
February Challenge 2018
Chef And His Characters, Chef And The Patents, Permutation and Palindrome
February Cook-Off 2018
Chef and Cook-Off, Chef and Tuples, Chef and Chefness, Chef and Line
March Challenge 2018 DIV 1
Pishty and Triangles, Chef and Gcd Queries
June Cook-Off 2018 Division 1
Masha and Minions, Sonya and Segments, Good Permutations
December Cook-Off 2018 Division 1
Yalalovichik Numbers, Yalalovichik Strings
April Challenge 2018 Division 1
Vaibhav and Ministers, Cutting Plants, Highway Crossing, Chef and Same Old Recurrence, Count Good Prefixes
June Challenge 2018 Division 1
Two Flowers, Vision, Ways to Work, Expected Buildings, Archi and Tree
July Challenge 2018 Division 1
Pizza Delivery, Tom and Jerry, Reach Equilibrium, No Minimum No Maximum, Gears
August Challenge 2018 Division 1
Safe Partition
September Challenge 2018 Division 1
Bad Shuffle
August Lunchtime 2018 Division 1
Chef and Eid, Mix Mix Game
October Lunchtime 2018 Division 1
Robots Again, Coloring the Grid, Weird Question, Niceness of the Arrays
December Lunchtime 2018 Division 1
Choosing from Buckets, Drawing Lines, Maximize the NOSS, Age Calculator
January Challenge 2019 Division 1
Yet Another Problem About Sequences, Different Neighbours, Partition the Graph, Distinct Pairs, Party, A Pizza Slice
January Cook-Off 2019 Division 1
Ada School
January Lunchtime 2019 Division 1
Distances, Wanderer, Rooks
February Cook-Off 2019 Division 1
Max Range Queries, Chef and Secret Password, Chef in Evil Land, Chef and Party
March Challenge 2019 Division 1
Chef and Soccer, Cheating on Queue, Treasure Hunt
March Cook-Off 2019 Division 1
XOR N-bonacci Sequence, Points and Convex Hulls, Markers and Caps, Music Shopping
April Challenge 2019 Division 1
Offer for Chef, Kira Loves Palindromes, Mininum XOR over Tree, Playing with Numbers, Subtree Removal
April Cook-Off 2019 Division 1
Doubly Increasing Path, Random Game, Pied Piper vs Hooli, Mystery Tree
May Challenge 2019 Division 1
Trees and Degrees, Where to Build the Roads
May Cook-Off 2019 Division 1
Misha and Nice Sets, Bitsetbaba and Power Grid, Expected Xor, Searching for a Biclique
May Lunchtime 2019 Division 1 (Unrated)
Grid Tour, Reverse Maximisation, XOR Magic, Abdullah and Toll Discounts
June Challenge 2019 Division 1
Lent Money, Count Arrays, Chef and Ingredients, Chef and His Dish, Intersecting Paths, Sum and GCD
June Lunchtime 2019 Division 1
The Grux Permutation , Gii and His Club, Igzi and Burly Array, Ivan Pesic and His World Tour
August Lunchtime 2019 Division 1
Equal Average, Destroy Cells, Chef Does Coke Yet Again
September Challenge 2019 Division 1
Expected GCD, Doofish Set, Power Sum
October Challenge 2019 Division 1
Even Edges, Bacterial Reproduction, Chef and Maximum Star Value, Array Modification
November Challenge 2019 Division 1
Physical Exercise, Smallest Beautiful Number, From Zero to Infinity, Single Point of Failure, Winning Ways
December Challenge 2019 Division 1
Chefina and Ranges, Binary XOR, Binomial Fever, Scoring Pairs, Sticky Notes, Test Generation, Addition
March Challenge 2020 Division 1
Winning Ways 2
April Challenge 2020 Division 1
Strange Number, Squared Subsequences, Perfect Power Divisors, Ready Bitwise, Factor Tree, Leaked Answers (Challenge)
May Challenge 2020 Division 1
Buying a New String, Triple Sort, Binary Land, Sorting Vases, Not a Real World Problem, Chef and Rainbow Road, Chef and Bitwise Product
March Cook-Off 2020 Division 1
Mysterious Sequence, A Tree to Remember, Maximize Letter Beauty, Random Chocolates, Escape the Tree
April Cook-Off 2020 Division 1
The Gifting Problem, Inversions in Permutations
March Lunchtime 2020 Division 1 (Unrated)
Maximize LCM, Strip in a Tree!
June Challenge 2020 Division 1
The Tom and Jerry Game!, Perfect Partitions
July Challenge 2020 Division 1
LCM Constraints, Chefina and Swaps, Easy Geo xD, Chef and Dragon Dens, Missing a Point, Doctor Chef, Weird Product, Expected Repetitions, Expected Spanning Trees
August Challenge 2020 Division 1
Insanely Hard School Exams, Subsequence Frequency Counting, Precious Stones , Chefina and Strange Tree, Smallest KMP, Chef Thanos Wants Perfect Balance, Chef and Wedding Arrangements
September Challenge 2020 Division 1
Chefina and Swap, Chef and Trump Cards, Find XOR, Rotate the Polyline, Ada Matrix
July Cook-Off 2020 Division 1
What Is This, a Crossover Episode, The In-XOR-able Task, Even-tual Reduction, OR-thodox Distinction, Path-etic Products
July Lunchtime 2020 Division 1
Golomb Sequence, Coloured Pairings, Binary Concatenation
October Challenge 2020 Division 1
Inversions, Positive AND, Replace for X, Compress all Subsegments, Adding Squares
November Challenge 2020 Division 1
Panic! at the Disco, Chef and the Combination Lock, Restore Sequence, Magical Candy Store, Red-Black Boolean Expression, Scalar Product Tree, Unusual Queries
December Challenge 2020 Division 1
Hail XOR, Square Root of LCA Convolution, Calculus, Permutations, String Operations, Positive Prefixes, Even Pair Sum
December Cook-Off 2020 Division 1
Self-Destructing Strings, Sed Passwords, Circle of Chaos, Carry All Fruits
December Lunchtime 2020 Division 1 (Unrated)
K-Tuple Tree, Even Sequence, Three Letters, One Zero Swaps
January Lunchtime 2021 Division 1 (Unrated)
Good Grid, Dreams of Divisibility, Even Sum
October Cook-Off 2020 Division 1
Path-etic Sums, An Inveractive Problem, The In-XOR-able Task, Yet Another Crossover Episode
November Cook-Off 2020 Division 1
Flip the String, Chef and IPC Certificates, Communication Channel, Hiring Workers
October Lunchtime 2020 Division 1
Chef Likes Good Sequences, Chef Is Just Throwing Random Words, Counting Spaghetti, Cute Chef Gift
November Lunchtime 2020 Division 1
Gasoline, Rook Path, Fractions
Coders' Legacy (Rated for all)
Chef vs Doof, Doof on Cartesian, Doof fires Brackets, Jeremy gets a gift
September Cook-Off 2020 Division 1
Joined Subarrays on Tree, Maximise Subsequence Value, Minimum Insertions
February Challenge 2021 Division 1
Team Name, Another Tree with Number Theory, Prime Game, XOR Sums
February Lunchtime 2021 Division 1
Average Sorting, Sed Max, Chef and Reordering, Independent Set
March Lunchtime 2021 Division 1
Uniform, Lunchtime, Gamer
April Cook-Off 2021 Division 1
Array and Operations, Tree Distances, OR of ANDs, Valet Parking
April Lunchtime 2021 Division 1
A Special Tree
May Lunchtime 2021 Division 1
Total Components, K-Subarrays
June Challenge 2021 Division 1 (Unrated)
Minimum Dual Area, Bitwise Tuples, Maximum Frequent Subarray Sum, MathBuzz, Minimum Subtree Cover
June Lunchtime 2021 Division 1
Richie Rich
July Challenge 2021 Division 1 (Unrated)
Even Odd Partition, Chef and Pairs
July Cook-Off 2021 Division 1
Beautiful Subsequence, Mod Equality, Hidden Colored Graph
July Lunchtime 2021 Division 1
Xor Separation, Longest Good Segment
August Lunchtime 2021 Division 1
Bunny Hops, Just a Graph, Longest Spanning Substrings, Chef and Deque
SnackDown 2021 - Online Qualifiers
Prefix as a Substring 2, Lucky Number, Maximum Number Of Distinct Elements, Minimise Difference
SnackDown 2021 - Online Round 1A
Yet Another Flipping Problem, Round Robin Ranks , Dance Moves, Equal Beauty, Min Max LCM
SnackDown 2021 - Online Pre-Elimination
Non-Decreasing Subsequence of size K, Product Pain, Guests like slippers
SnackDown 2021 - Online Elimination Round (Rated for all)
Random Convex Hull, Graduate Work Matters, Sorting Segments
November Lunchtime 2021 Division 1
Permutation Pairs, Subarray Jumps
December Cook-Off 2021 Division 1
Binary String Game, RGB Construction
December Lunchtime 2021 Division 1
Optimal Sorting, Romantic Reversals, Sleep Technique , Point constraints
February Cook-Off 2022 Division 1
Xor Becoming Uncanny, Perfect Permutation, PerMEXuation , Mango Market
March Lunchtime 2022 Division 1
Subsequence, Mathology, Winter, Adjacency Love
April Long One 2022 Division 1 (Unrated)
Yet Another Mex Problem
April Lunchtime 2022 Division 1(Rated)
Do Not Touch the MEX!!!, Secret Machine Mania, AND Palindromes
May Cook-Off 2022 Division 1 (Rated)
Different Subarrays Rearrange, Triple Inversions
Starters 40 Division 1 (Unrated)
The Three Bogatyrs, Max Value of MST, Or Permutation, Good Pairs
July Cook-Off 2022 Division 1 (Rated)
Segmentation Fault, Subsequence LCM
June Cook-Off 2022 Division 1 (Rated)
Throw and Take, Simple XOR, Prefix Suffix Distinct, Split AND Sum
June Long One 2022 Division 1 (Unrated)
Add By Permutation
June Lunchtime 2022 Division 1 (Rated)
The Lost Array, Max Shift After XOR, XOR Times 2 Is Sum, Minimum Xor On Segment, XOR, The Detective
Starters 51 Division 1 (Unrated)
Chef & Cook Game, Differentiation, Prefix Suffix And Or
Starters 52 Division 1 (Unrated)
Flipping Failure, Nil Xor
September Long 2022 Division 1 (Unrated)
Alone Alice!
Starters 71 Division 1 (Unrated)
Pet Store, Flip the Prefix, Unique Mode, Instagram, Snapchat, Expected Sum, Perfect Trio, Maximizing LCS
Starters 72 Division 1 (Rated till 5-Stars)
Indivisible, Apples and oranges, N Triplets, Sum it
Starters 86 Division 1 (Rated for All)
Least Size, Minimum Operation, String Game , Largest Y
Starters 87 Division 1 (Rated till 6 Stars)
Count the Permutations (always), Inversions of subsequences, AB plus C, One or All
Starters 88 Division 1 (Rated till 6 Stars)
Maximum And Or, Chef and Asteroids, Good Operations, Minimize the Bits, Chef and Good Array, Minimum OR Spanning Tree
Starters 89 Division 1 (Rated till 5 Stars)
Positive or Negative Subarrays, Subarray Removal, Two Averages, Restore Communication, Tree Queries, Evil Infection
Starters 90 Division 1 (Rated till 6 Stars)
Crushed Apples and a Balance Scale, Minimum Ugliness, Sum of Goodness, Printing Binary Array, Anti Palindrome
Starters 91 Division 1 (Rated till 6 Stars)
Cheapest Office, Odd GCD Permutation, Chef Odd, Maximum Sum Permutation
Starters 92 Division 1 (Rated till 6 Stars)
Rectangular Tiling, Dividing into Groups, Beautification of array, Distance Coloring
Starters 93 Division 1 (Rated for All)
Thank U, Next, Why Try, NASA, Greedy, Bloodline, Motive
Starters 95 Division 1 (Rated till 6 Stars)
Guess Game, Chef and Moves of GCD, Partition and Maximize, Boxes, Transfusion Chain, Break This Array
Starters 96 Division 1 (Rated till 5 Stars)
Swap the numbers, Mex Array, Absolute Differences
Starters 97 Division 1 (Rated till 6 Stars)
Make It Special, Unreachability Cost, No Palindrome, Triplets Min
Starters 99 Division 1 (Rated till 6 Stars)
Segment Three, Musical Chairs, Two Piles, Yet Another Bitwise Problem, Exclusion-Inclusion
Starters 100 Division 1 (Rated)
Prime Permutation, Stamps 100, Concussive Sequence, Combinatorics Is Fun, Ant
Starters 102 Division 1 (Rated till 6 Stars)
Chess ELO, Parity Permutation, Light The Bulb, Chef Segment, Bit Play
Starters 103 Division 1 (Rated till 6 Stars)
Squarified, Chandelier, Unique xor, Divisible By 8
Starters 104 Division 1 (Rated till 6 Stars)
Find Diameter, Combinatorics Is Fun, Longest Non Decreasing Subsequence, Lexicographically Largest , Construct An Array, Maximise Sum
Starters 105 Division 1 (Rated till 6 Stars)
Ghoul-icious Goodies, Racing Dead, Spooky Sequences, Dull Operation, Wishcraft
Starters 106 Division 1 (Rated till 5 Stars)
Playing with OR, Save People, Guess the winner!, Count Possibilities, Smallest Excluded LCM, Reach Anywhere, Summing the values, Is it Obvious
August Long 2023 Division 1 (Unrated)
Spiritual Chef
Starters 111 Division 1 (Rated till 6 Stars)
LCM Mania, Prefixing, Prime Range Game, Beautiful Strings, ODI Cricket, Component Count, Square Count
Starters 112 Divison 1 (Rated till 6 Stars)
Cursed Indices, Yet Another Array Game, Subtree Coloring, Permutation Construction
Starters 113 Division 1 (Rated)
Count Distinct Arrays, Counting Is Fun, Maximise The Minimum, Minimise Maximum Subarray Sum, Make All Equal, Score Sum, Maximum Score
Starters 115 Division 1 (Rated)
Delete The Array, Subtraction Sequence I, Subtraction Sequence II, Greedy LIS Algorithm, Binary Grid Forces, Make All Zero
Starters 116 Divison 1 (Rated till 6-Stars)
Chef Product, ORST , Permutation Sort, Exact Savings
Starters 125 Division 1 (Rated till 6-Stars)
Bucket Game, Operating on A, Binary Minimal
Starters 126 Division 1 (Rated till 6 Stars)
Tree Distance Set, Freedom, Uncommon Cycles, LCD, Triangular Swaps
Starters 133 Division 1 (Rated till 6-Star)
ABC Conjecture 3, Powered Parameters, Too Far For Comfort, Fireworks, Too Far For Comfort (Easy Version)
Starters 135 Division 1 (Rated till 5-Stars)
Milky-Dark Chocolates, Graph Cost, Limit of MEX, Change A to B
Starters 136 Division 1 ( Rated till 6-Stars )
Game On Rectangle, Lexicographically Maximal Prefix AND, Sum of Max K Subarray, Minimum Segments, Sum of Modes
Starters 137 Division 1 (Rated till 5-Stars)
Unusual Queries
Starters 138 Division 1 (Rated till 6-Stars)
A power B mod C , TRIPLE PRIMES, Prefix Suffix Inequality, Distinct Substring
Starters 140 Division 1 (Rated till 5-Stars)
Lucky Matrix, Split Permutation, Trick Or Treat, Break The String, Tree Removal
Starters 141 Division 1 (Rated till 5-Stars)
Possible Contender, Amphibian Escape, Perfect Prefixes
Starters 142 Division 1 (Rated till 5-Stars)
Sum of Xors, Pairs Sum with Length x, The Cards Machine, Array Removal, Number Hunt
Starters 143 Division 1 (Rated till 5-Stars)
Non-Divisor Array, Max Min and Length
Starters 145 Division 1 (Rated till 6-Stars)
Beautiful Array, Make Bob Win , Querified, Square String
Starters 146 Division 1 (Rated till 5 stars)
Back Front, Connect The Chains, Bouncing Ball, Permutation Construction, Binary Strings Yet Again
Starters 147 Division 1 (Rated till 5 stars)
Counting Triangles 101, K Subsequence 101, Truth Teller And Liars 101, Independence Day 101, Non-Primes 101, Gold Coins 101
Starters 153 (Rated till 5 stars)
Another Game, Colorful Tree (Easy Version), Xometry (Easy Version)
Starters 161 (Rated)
Min-Max Game, Red-Blue Sort, One To Three, Quick Exit