Boris Levine
- lboris
United Kingdom- Professional
- StoneX Group Inc
- No Active Plan. View Details
Activity Heat Map
Learning Paths (0)
Practice Paths (1)
Contests (97)
June Cook-Off 2014
Painting
October Cook-Off 2014
Walk on the Axis
June Challenge 2014
Chef and Digit Jumps, Chef and Subarray, Guessing Game
July Challenge 2014
Little Elephant and Painting, Garden Game, Chef and Frogs, Count Substrings, Reach The Point, Dish Owner
August Challenge 2014
Chef and Reversing, The Leaking Robot, Cleaning Tables, Chef and Gift
September Challenge 2014
Chef and Rainbow Array - 2, Chef and Left-Right, Fun with Rotation
October Challenge 2014
Remy paints the fence, Chef and Ground, Chef and Painting, Chef and Square, Magical Girl and Colored Liquid Potions, DevuLand, Dinosaurs and Laddus
November Challenge 2014
Distinct Characters Subsequence, Chef and Red Black Tree, Let us construct palindrome
December Challenge 2014
Chef and Apple Trees
February Challenge 2015
Chef and Chain, Chef and Strange Formula, Chef and Strings, Let us play with rank list, Jigsaw Puzzle Solving, Chef and Equality
March Challenge 2015
Chef and Notebooks, Sereja and Random Array, Devu and his Class, Sign Wave, Matrix
April Challenge 2015
Count Sequences, Chef and Array, Chef and Interview, Broken Telephone, Inversion sorting, Division of Lands, Chef and Piano Scales, Black-white Board Game
May Challenge 2015
Devu and his three Hands, Devu and binary String, Chef and Prime Divisors, Set Difference , Chef and new recipe, Shopping, Chef and Cake
June Challenge 2015
Sereja and Matrix Division, Steady tables, Chef and His Friend, Chef and Memory Limit, Chef and Polygons, Another Fibonacci, Anticommutative implication, Chef and String
July Challenge 2015
Addition and Multiplication, Maximum Difference Walk, Sereja and Game 2, Bread, MasterChef, Na2a and lucky stone, Chef and Cube, Rohith and Circles
August Challenge 2015
Way Out, Social Cluster, Gravity Guy, Devu And Churu , Cooking Machine, Aditi and Magic Trick, Chef and insomnia
September Challenge 2015
Chain of Doughnuts, Nikitosh and xor, Count Steps in Matrix, Bank robbery, Lighthouses, Cracking the Code, Chef and Chetris
October Challenge 2015
Time measure, Count Subarrays, Who dares to be a millionaire, Spheres, Rupsa and Equilateral Triangle, Misha and Gym, Efficient Delivery
November Challenge 2015
Nikitosh and Sauron-tetrahedron, Ingredients, Receipt Recovery, Chef and collection of stamps, Eugene and function, Simple Sum, Chef and cakes, Scrabble on a Graph
December Challenge 2015
Sereja and Dividing, Chef and cinema, Chef and the stones, Plane Division, Oracle Devu and Longest Common Subsequence, Misha and Permutation, Chef and Filters, Chef and Girls, Trip and Palindromes, Tanks
February Cook-Off 2015
Fit Squares in Triangle
January Long Challenge 2016
Sereja and Salesman, Chef and Inflation, Rupsa and the Game, Churu and Balls, Chef and Making Triples, Asteroids, Cyclist Race, Chef and Time Machine, Devu and Perfume
February Challenge 2016
Chef and Job and Rest, Sereja and Two Lines, Chef and Strange Operations, Devu and a light discussion, Rectangles of Love, Chef-Detective, Matrix Maximum Sum, Sereja and Permutations, Call Center Schedule
March Challenge 2016
Sereja and Two Strings 2, Chef And Hungry Birds, Palindromic substrings, Floor Distribution, Chef and Number Guessing, maximize the sum, Parity tree, Chef And Special Dishes
April Challenge 2016
Help Watson Escape, Fibonacci Queries, Chef and Ballons, Chef And Magical Path, Chef And Coloring, Game of snakes on a grid
May Challenge 2016
Sereja and GCD 2, Easy Queries, Chef and math, Chef and Balls, Forest Gathering, Chef and Amazingness of Numbers, Optimal Shopping II, Chef and Big Soccer, Laddu
June Challenge 2016
Chef And The Hiring Event, Chef and Rectangle Array, Chef and New Game, Chef and Array and K, Chef And Binary Operation, Chef and Coins Game, Chef and cities, Devu and an Array
July Challenge 2016
Andrash and Stipendium, Chef and Segments, Chef and Tetris, Chef and special numbers, Chef and Robots Competition, Chefland and Electricity, Scheduling jobs on a cluster
September Challenge 2016
Chef and Friends, Dividing Machine, Chef and Matrix Division, Chef and digits of a number, Faded Palindromes, JosephLand, Chef and calculation, Chef and Cut
October Challenge 2016
Sereja and Progressions, Sereja and Stones, Chef and Keyboard, Big Queries, Fenwick Iterations, Chef and Three Dogs, Chef and Two String
November Challenge 2016
Count Permutations, Friends Meeting, Urban Development, Gift and Chef, Chef and squares, Sereja and Ways in the Cube, Task for Alexey
December Challenge 2016
Train Partner, Kth Max Subarray, Kirito in labyrinth, Edit Distance Revisited, Roses for Alexey, Our Base is Under Attack, Bear and Three Colours
January Cook-Off 2016
Chef and Destruction, Chef and Fruits
February Cook-Off 2016
Puppy and Catchers, Puppy and Sum
July Cook-Off 2016
Chef and Proportion, Chef and Numbers, Chef and Land
January Challenge 2017
Capital Movement, Cats and Dogs, Sereja and Circles, Sereja and BOX, Chef and Circle, Fantastic Four, Digits Cannot Separate, Reservior, Tourists in Mancunia
February Challenge 2017
Chef and Yoda, Eugene and big number, Primitive Queries, Interval Game, Sereja and Inversions, Rebel rescue, Chef and Triangles, Chef and his Best Friend, Chef and His Apartment Dues, Most Frequent Element, Gerrymander, Alice and her garden
March Challenge 2017
Cooking Schedule, Completing favorite game, Xenny and Alternating Tasks, Pishty and birthday, Bear and Extra Number, Bear and Cat Trap, (CH) Bear and Sorted Rows, Bandwidth of a matrix
April Challenge 2017
(CH) Serejs and Billiards, 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 , Long Sandwich , Gotham PD, Chef and his daily routine, Courses in an university, Blocked websites, Median of adjacent maximum numbers, Chef and Subsequences, Chef and Battleship, Painting Tree
June Challenge 2017
Persistent oak, Chef and Prime Queries, Saboteur (Challenge), 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, Multiplication Program, Tree Expectancy, Whats in the Name, Servers (Challenge), Calculator , IPC Trainers, Two Coins
August Long Challenge 2017
Chef and Rainbow Array, Chef And Fibonacci Array, Chef and Mover, Hill Jumping, Walks on the binary tree, Palindromic Game, Mathison and the Data Warehouse (Challenge), Greedy Candidates, Strings and Graphs, Flower Pots
September Challenge 2017
Sereja and Commands, Sereja and Functions (Challenge), Chef and Pick Digit, Minimum Good Permutation, Weasel does Xor on Tree, Weasel finds Staircase, Fill The Matrix, Little Chef and Sums
October Challenge 2017
Chef and Magic Arrays, Chef and a great voluntary Program, Chef and Cycled Cycles, Shooting on the array, Max Mex, Counter Test For CHEFSUM, A Balanced Contest, (Challenge) Connecting computers, Lucky Edge
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
December Challenge 2017
Chef and Universe, Total Diamonds, Santa Delivering Problem, Chef And his Cake, Chef And Easy Xor Queries, Penalty Shoot-out, Red and blue points, Chef and Hamming Distance of arrays
July Cook-Off 2017
Chang and Bitwise OR, Chang and the Perfect Function, Chang and Perfect Quadruples
September Cook-Off 2017
Infinite OR Game, Statistics Construction, Subsequence Equality
November Cook-Off 2017
Skiing, Online Chess, Random Pair
July Lunchtime 2017
Find the Maximum Value, Good Pairs
September Lunchtime 2017
Chef and Dice, Chef and Cook-Off Contests
January Challenge 2018
(Challenge) Chef and Palindromes, Killing Monsters, A humongous Query, Simplify the Square Root, Killjee and k-th letter , K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers
February Challenge 2018
Broken Clock, Lucas Theorem, Chef And Land Labeling, Chef And His Characters, Chef And The Patents, Akanksha and End of Semester, Chef and odd queries, Points Inside A Polygon, Car-pal Tunnel, (Challenge) Biased Committee, Permutation and Palindrome
February Lunchtime 2018
Prefix borders, Game with numbers, Jumping in the hills
March Challenge 2018 DIV 1
Pishty and Triangles, Chef and Easy Problem, Chef and Gcd Queries, A Big Sale, Mix the Colors, Chef and Glove, Minions and Voting, Minion Chef and Bananas, Embedding a Tree (Challenge)
May Cook-off 2018 Division 1
Difficult Choice, Best Cake Ever
April Challenge 2018 Division 1
Chef and Array (Challenge), Vaibhav and Ministers, Chef at the Food Fair, Cutting Plants, Highway Crossing, Chef and Same Old Recurrence, Count Good Prefixes, Average of Pairs, Workers, Chef and Same Old Recurrence 2
May Challenge 2018 Division 1
S-T Mincut, Change the Signs, Edges in Spanning Trees, Minimum Deletions, Not a Convex Hull (Challenge), Fake Binary Search, Rubber Band, Dibs on Fibs
June Challenge 2018 Division 1
Two Flowers, Vision, Ways to Work, Archi and Tree
July Challenge 2018 Division 1
Pizza Delivery, Reach Equilibrium, Chef and War with Taran (Challenge), No Minimum No Maximum, Gears, Magic Set, Strike or Spare
August Challenge 2018 Division 1
Coordinate Compression , Modular GCD, Safe Partition, Interactive Matrix, Lonely Cycles, Sheokand and Number
September Challenge 2018 Division 1
AND Square Subsegments, Selinas the Chefs Falling on the Tree, Sasha and Photos, Magician versus Chef, Chef and Condition Zero (Challenge), Factorize, Chef and Adventures, Table Game, Bad Shuffle
December Challenge 2018 Division 1
(Challenge) Delete DAG, Colorblind Feast, Max and Electrical Panel, Directing Edges, Chef and Interactive XOR
November Challenge 2018 Division 1
Chef and Recipes, Chef and Ridges, Appy Loves One, Good Median, Chef, Primes and Trees (Challenge), Magician versus Chef 2, Binary Strings, Chef and Difficult Contests, Chef and Happiness
October Challenge 2018 Division 1
Walk on Tree, Appy and Balloons , Beautiful Bricks, Minimize Digitsum, Chef and Surprise Chessboard, (Challenge) Chef and Takonemo, Coprime Components, Chef and Serves, Byte to Bit, Chef and Circles, Distinct Rows in Submatrices
November Lunchtime 2018 Division 1
Useful Number, Beats and Pieces
October Lunchtime 2018 Division 1
Coloring the Grid, Weird Question
January Challenge 2019 Division 1
Yet Another Problem About Sequences, Different Neighbours, Partition the Graph, Distinct Pairs, Maximum Distance, Party, (Challenge) Chef and Matching Game, A Pizza Slice
February Challenge 2019 Division 1
Manhattan Rectangle, Guess It Right, Chef and Secret Ingredients, Xor Decomposition, Yet Another Tree Problem, (Challenge) Chef with Orchestra in the Kitchen, Art of Balance, Maximize the Tax
March Challenge 2019 Division 1
Chef and Soccer, Cheating on Queue, Yet Again a Subarray Problem, Matchable Permutations, (Challenge) Interleaving Strings
April Challenge 2019 Division 1
Offer for Chef, Kira Loves Palindromes, Mininum XOR over Tree, Playing with Numbers, Friend or Girlfriend, Maximum Remaining, Subtree Removal, Fencing, Edgy, Moving Rectangles (Challenge)
May Challenge 2019 Division 1
(Challenge) Chef Exchange, Ada Rooks 2, Reduce to One, Where to Build the Roads, Sonya and Gifts
June Challenge 2019 Division 1
Lent Money, Chef and Ingredients, Chef and His Dish, Intersecting Paths, Sum and GCD, (Challenge) SnackDown 99
July Challenge 2019 Division 1
Hit the Coconuts, Snake and Apple Tree, Guess the Prime!, Codechef War, Circular Merging, (Challenge) Codechef War II
August Challenge 2019 Division 1
Guddu and his Mother, Encoding, Tree Sequences, Dilemma, Maximize an Expression, Chef and Gordon Ramsay, Complement Spanning Trees, Football, Distribute Apples, Zombie and the Caves, (Challenge) Bacteria Synthesis
September Challenge 2019 Division 1
Biladerim Icin, Fuzzy Linear Combinations, Expected GCD, Doofish Set, Dodgers, Chef Designed a Network, (Challenge) Sebi and CPU Design
September Lunchtime 2019 Division 1
All Substrings, Ice Cream Queue, Treeversion, Find the Sum
October Challenge 2019 Division 1
Even Edges, Missing Number, Bacterial Reproduction, Chef and Maximum Star Value, Fun with Lists, Array Modification, (Challenge) Maximizing LIS, Operations on a Matrix
November Challenge 2019 Division 1
Physical Exercise, Smallest Beautiful Number, From Zero to Infinity, A Simple Game, Single Point of Failure, (Challenge) Coloring Triangulations
December Challenge 2019 Division 1
Chefina and Ranges, Plus Multiply, Binary XOR, Binomial Fever, Sticky Notes, Test Generation, (Challenge) Cubical Virus, That Is My Score!, Addition
January Challenge 2020 Division 1
Chef and Dynamo, Doraemon, Doofish Matrix, Chefina and Prefix Suffix Sums, English, Army of Me, Chefland Army, (Challenge) Building Anthills
February Challenge 2020 Division 1
Chef and Railway Stations, Expected Change, No Change Required, Chef and Gordon Ramsay 2, (Challenge) Raisins, Long Contest and Cook Off Overlaps
March Challenge 2020 Division 1
Chef and DAG, Break, Winning Ways 2, Lasers Everywhere, Inverse of a Function, Lasers Everywhere Alternative, (Challenge) 300 IQ Ants
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, Chef and Bitwise Product, (Challenge) Nanobots
May Lunchtime 2020 Division 1
Convert the String, Tree difference
June Challenge 2020 Division 1
The Tom and Jerry Game!, Operations on a Tuple, The Delicious Cake, Convenient Airports, Covid Sampling (Challenge), Danya and Different Values
July Challenge 2020 Division 1
LCM Constraints, Chefina and Swaps, Chef and Dragon Dens, Missing a Point, Doctor Chef
August Challenge 2020 Division 1
Subsequence Frequency Counting, Chefina and Strange Tree, Smallest KMP, Ants (Challenge) , 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, Move the Coins - Creating Tests, Divide Candies, Vibrating Paths (Challenge), Ada Matrix
November Challenge 2020 Division 1
Connect on a Grid (Challenge), Restore Sequence, Magical Candy Store, Scalar Product Tree, Unusual Queries
January Challenge 2021 Division 1
Chef and Ants, Guess the Tiling, Expected Number of SCCs, Blackjack, Stack-Queue Sort (Challenge), And-Or Game
December Challenge 2020 Division 1
Hail XOR, Square Root of LCA Convolution, Calculus, String Operations, Positive Prefixes, Even Pair Sum
February Challenge 2021 Division 1
Team Name, Another Tree with Number Theory, Prime Game, Multiple Games, XOR Sums, Cut the Cake (Challenge), Bash Matrix, Cell Shell
March Challenge 2021 Division 1
Dense Graph, Consecutive Adding, Paparazzi Gennady, Substring Probability, Space Arrays, Wireless Electricity (Challenge), Locked Safe, Random Walk Queries, Maximum Topological Sort
April Challenge 2021 Division 1
Binary String MEX, Tree Permutations, Worthy Matrix, Destroy the EMP Chip, Chef and Pair Flips, Water Sort Puzzle (Challenge), Chef and Dice, Boolean Game
May Challenge 2021 Division 1 (Unrated)
Valid Paths, Tree House, An Interesting Sequence, King Killing, Xor Equality, Tic Tac Toe, Modular Equation
June Challenge 2021 Division 1 (Unrated)
Minimum Dual Area, Shortest Route, Bitwise Tuples, Bella ciao, Dual Distance, Maximum Frequent Subarray Sum, Summer Heat, MathBuzz, Optimal Xor Set, Minimum Subtree Cover
July Challenge 2021 Division 1 (Unrated)
XxOoRr, Chef vs Bharat, Even Odd Partition, Optimal Denomination, Chef and Pairs, Madoka and Ladder Decomposition, Dakimakura Distribition, K Path Query
August Challenge 2021 Division 1 (Unrated)
Special Triplets, Array Filling, Geometry 1, Chef and Bulb Invention, Alternating LG Queries, Charge Scheduling, Chef and Digits of Large Numbers, Fat Hut, Problem Difficulties, Olympics Ranking
September Challenge 2021 Division 1 (Unrated)
XOR Equal, Shuffling Parities, Minimize Digit Sum, Treasure Hunt, 2-D Point Meeting, Airline Restrictions, Travel Pass, Covaxin vs Covishield, Minimum Digit Sum 2
SnackDown 2021 - Online Qualifiers
Prefix as a Substring 2, Lucky Number, Maximum Number Of Distinct Elements, Minimise Difference
October Challenge 2021 Division 1 (Unrated)
Longest AND Subarray, Digit Removal, MEX-OR, Yet another MEX problem, Characteristic Polynomial Verification, Hidden Points
SnackDown 2021 - Online Round 1A
Yet Another Flipping Problem, Round Robin Ranks , Dance Moves, Min Max LCM
November Challenge 2021 Division 1 (Unrated)
Flip or Compress, Functional Array, Wildcard Replacement, Xor Equation, Weird Palindrome Making, Hill Sequence, Maximise the bridges, Convex Hulk
December Challenge 2021 Division 1 (Unrated)
Increasing String , Yet Another Tree Problem, Valleys and Hills, Rock Paper Scissors, Pyramid Traversal, Min Manhattan Distance, Squares Counting
January Long 2022 - II, Division 1 (Unrated)
Array Partition, Power Sum, Tree Master, Sum and OR, Crying Colours
February Long 2022 - I, Division 1 (Unrated)
Random OR, Digit Multiplication By K, Binary Base Basics, Bitwise Blend, Remove Adjacent
February Long 2022 - II, Division 1 (Unrated)
Sequence GCD, Bitwise swaps, Xor Palindrome
March Long One 2022, Division 1 (Unrated)
Subarray XOR, Substring of a Substring, Count the Ones, Exact Marks, MEX on Trees
April Long One 2022 Division 1 (Unrated)
Dazzling AXNODR Challenge , Bullets and Enemies, Min Max Equality, Pairwise Xors
April Long Two 2022 Division 1 (Unrated)
Geometric Mean Inequality, Chef And Division
May Long One 2022 Division 1 (Unrated)
Mystical Numbers, The Magical Stone, Alternating Diameter, Four Arrays
May Long Two 2022 Division 1 (Unrated)
Subsequence-Numbers Divisible by 7, Not Tree Again!, Subarrays with length
June Long One 2022 Division 1 (Unrated)
Full Path Eraser, Expected move, Reduce to zero, Divisible by i , Possible GCD
June Long Two 2022 Division 1 (Unrated)
Gcd and Lcm , AP Grid, Reversal Sorting
August Long 2022 Division 1 (Unrated)
Angled Flip, XOR with smallest element, Hello Equation
September Long 2022 Division 1 (Unrated)
Distinct Numbers, Pokemon Battles, Alone Alice!, Interesting Subarray
October Long 2022 Division 1 (Unrated)
A drawing game, Chef And Array Construction, Twos and Zeros, Binary Substituition
November Long 2022 Division 1 (Unrated)
MaxEdges, Alice and the Array
December Long 2022 Division 1 (Unrated)
Sum of Cube , Divisible by A_i