Wiwit Rifa'i

Username:7★iafir
Country: Indonesia
Student/Professional:Professional
Organisation:Google
CodeChef Pro Plan: No Active Plan. View Details

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No. of Contests Participated: 97

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Contests (97)

December Challenge 2013

Magic Pairs

January Challenge 2014

Bon Appetit, Please like me, Chef and Feedback

January Cook-off 2014

Chef and the Cake I

February Cook-Off 2014

Chef and Remissness, Chef and Kingship, Chef and Reunion

March Cook-Off 2014

Dividing Stamps

May Cook-Off 2014

Divide the Cake, Ups and Downs

February Challenge 2014

Make Him Happy, Longest Common Pattern, Little Elephant and Subarrays

March Challenge 2014

Team Split, Binary Tournament, Walk, Little Chef and Numbers, Mike and Stamps

April Challenge 2014

Counting Matrices, Farmer Feb, Chef and Digits, Divide the Tangerine, Shortest Path in Binary Trees

May Challenge 2014

Compilers and Parsers, Chef-jumping, Chef and Strange Matrix, Stone

June Challenge 2014

Chef and Subarray, Guessing Game

July Challenge 2014

Chef and Frogs, Count Substrings, Reach The Point, Dish Owner

September Challenge 2014

Chef and Rainbow Array - 2, Chef and Left-Right, Chef and sequence, Fun with Rotation

October Challenge 2014

Remy paints the fence, Chef and Ground, Magical Girl and Colored Liquid Potions, DevuLand, Dinosaurs and Laddus

September Lunchtime 2014

Chef and easy problem

January Challenge 2015

Queries on the String, Chef and A Large Permutation, Chef and Stones, Sereja and Votes, One Dimensional Kingdoms, Gcd Queries

May Challenge 2015

Devu and binary String, Chef and Prime Divisors, Set Difference , Chef and new recipe, Chef and Cake

June Challenge 2015

Steady tables, Chef and His Friend, Chef and Memory Limit, Chef and Polygons, Anticommutative implication, Chef and String

July Challenge 2015

Addition and Multiplication, Sereja and Game 2, Bread, MasterChef, Na2a and lucky stone, Chef and Cube

August Challenge 2015

Way Out, 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

October Challenge 2015

Time measure, Count Subarrays, Who dares to be a millionaire, Spheres, Rupsa and Equilateral Triangle

November Challenge 2015

Ingredients, Receipt Recovery, Chef and collection of stamps, Eugene and function, Simple Sum, Chef and cakes

June Lunchtime 2015

Chef and Submatrix, Chef and Two Strings, Chef and Sets

July Lunchtime 2015

Greedy puppy, Puppy and game, Puppy and cats

January Long Challenge 2016

Sereja and Salesman, Chef and Inflation, Rupsa and the Game, Churu and Balls, Cyclist Race, Chef and Time Machine, Devu and Perfume

February Challenge 2016

Sereja and Two Lines, Chef and Strange Operations, Devu and a light discussion, Rectangles of Love, Chef-Detective, Matrix Maximum Sum

March Challenge 2016

Sereja and Two Strings 2, Palindromic substrings, 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

May Challenge 2016

Sereja and GCD 2, Easy Queries, Chef and math, Chef and Balls, Forest Gathering, Chef and Amazingness of Numbers, Chef and Big Soccer, Laddu

June Challenge 2016

Chef And The Hiring Event, Chef and Rectangle Array, 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 Robots Competition, Chefland and Electricity

August Challenge 2016

Chef and His Garden, Fighting Ebola, Chef and Circle Run, Chef and Chocolate, Chef and Round Run, Funny gnomes, Maximum Grid, A Good Problem

September Challenge 2016

Chef and Friends, Dividing Machine, Chef and digits of a number, Faded Palindromes, JosephLand, Chef and calculation

October Challenge 2016

Chef and Keyboard, Big Queries, Fenwick Iterations, Chef and Three Dogs, Chef and Two String, Bear and Shuffled Points

November Challenge 2016

Count Permutations, Friends Meeting, Urban Development, Gift and Chef, Kirito in Memeland, Chef and squares, Task for Alexey

December Challenge 2016

Train Partner, Kirito in labyrinth, Roses for Alexey, Our Base is Under Attack

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, Sherlock and Smallest Window

November Cook-Off 2016

Sebi and the cube, Sebi and the highway, Sebi and the corrupt goverment

February Lunchtime 2016

Chef and Socks, Chef and Tic-Tac-Toe, Chef and Polygons

April Lunchtime 2016

Maximum K Sums, Coins And Triangle

May Lunchtime 2016

Akhil Recovers The Lost Array, Akhil And Colored Balls, Akhil And Pending Homework, Akhil And Random String

June Lunchtime 2016

Collisions, One more weird game, Square in numbers

September Lunchtime 2016

Chef and Inequality

November Lunchtime 2016

Chef and his Students, Chef and Square Set, Tom & Jerry

December Lunchtime 2016

Superheroes and villains, Fly height mode, MST Queries

January Challenge 2017

Capital Movement, Cats and Dogs, Chef and Circle, Digits Cannot Separate, Reservior, Tourists in Mancunia

February Challenge 2017

Chef and Yoda, Eugene and big number, Primitive Queries, Interval Game, Sereja and Inversions, Chef and Triangles, Chef and his Best Friend, Chef and His Apartment Dues, Most Frequent Element, Gerrymander

March Challenge 2017

Cooking Schedule, Completing favorite game, Xenny and Alternating Tasks, Pishty and birthday, Bear and Extra Number, Bandwidth of a matrix

January Cook-Off 2017

Digit Longest Increasing Subsequences, Matrix Transformation, Digit Longest Increasing Subsequences 2

February Cook-Off 2017

Download file, Chairs, Cooking Game

January Lunchtime 2017

Sealing up, Nothing in Common

April Challenge 2017

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

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, Whats in the Name, Calculator , IPC Trainers

September Challenge 2017

Sereja and Commands, Chef and Pick Digit, Minimum Good Permutation, Sum of Cubes, 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

November Challenge 2017

Villages and Tribes

December Challenge 2017

Chef and Universe, Total Diamonds, Chef And his Cake, Chef, Leonardo And Queries, Chef And Easy Xor Queries, Penalty Shoot-out, Red and blue points, Chef and Hamming Distance of arrays

March Cook-Off 2017

Rainbow Graph, Yet Another Card Game, Increasing Xor Sequence, Safe Robot

April Cook-Off 2017

Bear and Shop Trip, Bear and Candies 123, Bear and AB

May Cook-Off 2017

La Liga, Balanced Array, Hussain Set, Nasty Queries

June Cook-Off 2017

Ada and crayons, Knight Covering, SnackUp, Centeroid

July Cook-Off 2017

Chang and Bitwise OR, Chang and the Perfect Function, Chang and Perfect Quadruples

August Cook-Off 2017

Game on Stick, Matrix and Chef, Real obtuse, From heaven to earth

November Cook-Off 2017

Hasan and boring classes, Skiing, Online Chess, Random Pair

March Lunchtime 2017

Bear and Haircut, Bear and Ladder, Bear and Species

April Lunchtime 2017

Bear and Digit Virus, Bear and Segments, Bear and Segment 01

May Lunchtime 2017

Post Tree

Alkhwarizm 2017 (Rated)

Logan and his XOR debacle, X-24 and his SUBSET code, Logan and his STRING dilemma, Charles and the BRUTAL subsequences, Professor X and Grouping of Numbers, Logan and DIGIT IMMUNE numbers

IOPC 2017 (Rated)

The Birthday Tears, Game Of Life, Max Out, Christmas Time, Solve the Assignment

January Challenge 2018

Killing Monsters, A humongous Query, Killjee and k-th letter , K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers

January Cook-Off 2018

Multiple of 3, Make array great again, Finding the matrix, Survive in ChocoLand

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

March Challenge 2018 DIV 1

Pishty and Triangles, Chef and Interval Painting, Chef and Easy Problem, Chef and Gcd Queries, Mix the Colors, Minions and Voting

March Cook-off 2018 Division 1

Chef Goes to the Cinema, Chef Restores an Array, Chef Restores a Matrix

July Cook-Off 2018 Division 1

Sticks, OR Matrix, Finding Second Maximum, Chef and GCD Game

April Lunchtime 2018 Division 1

The hardest gcd problem, Triple-tree decomposition, Solve what you want, Fast forward travelling

May Challenge 2018 Division 1

S-T Mincut, Change the Signs, Edges in Spanning Trees, Fake Binary Search, Dibs on Fibs

July Challenge 2018 Division 1

Pizza Delivery, Reach Equilibrium, No Minimum No Maximum, Gears

August Challenge 2018 Division 1

Coordinate Compression , Modular GCD, Princess and Dragons, Chef in a Mysterious Land (Challenge), Safe Partition, Interactive Matrix, Chef at the River, Lonely Cycles

July Lunchtime 2018 Division 1

Forced Particles, GCD Sum, Prime divisors

ALKHWARIZM (Rated)

Harry in the Chamber of Secrets, Help Voldemort, Hedwig The Smart Bird, Room Of Requirement, Harry Potter and the Goblet of Fire, Harry Potter and the Deathly Hallows - 2, Wingardium Leviosa, Sam, The Charming Angel

Insomnia 2018 (Rated)

Correct Bracket Sequence, Count Nodes, Split Sums, A Game of Game, DP Made Easy, Strange Swaps, Function Function

Code Melange (Rated)

XD Subsequences, CPI Crisis, Longest Constrained Subsequence, The Deadly Sin, Candy Love

January Challenge 2019 Division 1

Yet Another Problem About Sequences, Different Neighbours, Partition the Graph, Distinct Pairs, Party, 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

February Cook-Off 2019 Division 1

Max Range Queries, Chef and Secret Password, The Most Amazing Dish, Chef in Evil Land, Chef and Party

March Challenge 2019 Division 1

Chef and Soccer, Cheating on Queue, Yet Again a Subarray Problem, Matchable Permutations

March Cook-Off 2019 Division 1

XOR N-bonacci Sequence, Points and Convex Hulls, Markers and Caps, Music Shopping

September Mega Cook-Off 2019 Division 1

Angry Grandfather, Palindromes Machine, Hiring Chefs, Fitness Exercises

Code Melange (Rated for all)

Misplaced Signs, Optimal Splitting, Greg and Grid, A Small Array, Go Round, Some Impact, Longest Xommon Subsequence, Subset Numbering, Max power

May Cook-Off 2020 Division 1

Chef, Chefina and Their Friendship, Chefina on a Trip, Roads in Chefland

July Cook-Off 2020 Division 1

What Is This, a Crossover Episode, MEX-ception, The In-XOR-able Task, Even-tual Reduction, OR-thodox Distinction, Path-etic Products, I Hate Symbo-LIS-m