Ruhan Habib

Practice: 

Chef and Bitwise OR Operation, Maximum K Sums, Akhil Recovers The Lost Array, Bear and Xor of Sums, Chang and Bitwise OR

April Challenge 2014: 

Farmer Feb

June Challenge 2015: 

Chef and Memory Limit

July Challenge 2015: 

Na2a and lucky stone, Chef and Cube

August Challenge 2015: 

Gravity Guy, Cooking Machine

October Challenge 2015: 

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

October Lunchtime 2015: 

emitL

March Challenge 2016: 

Palindromic substrings, maximize the sum, Chef And Special Dishes

April Challenge 2016: 

Help Watson Escape, Fibonacci Queries, Chef and Ballons, Chef And Magical Path, Chef And Coloring

July Challenge 2016: 

Andrash and Stipendium, Chef and Segments, Chef and Robots Competition, Chefland and Electricity

November Challenge 2016: 

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

December Challenge 2016: 

Train Partner, Kirito in labyrinth, Our Base is Under Attack

January Cook-Off 2016: 

Chef and Fruits

March Cook-Off 2016: 

Digital clock, Dual Nim, Alternating subarray prefix

January Lunchtime 2016: 

Exponential Sub-Palindromes, Triangle Classification

March Lunchtime 2016: 

Two Closest, Simple Statistics

May Lunchtime 2016: 

Akhil And Colored Balls, Akhil And Random String

June Lunchtime 2016: 

Collisions, One more weird game

August Lunchtime 2016: 

Studying Alphabet, Lock-Free Stack

September Lunchtime 2016: 

Chef and Inequality

December Lunchtime 2016: 

Superheroes and villains, Fly height mode

Counter Strike: 

Terrorist or Counter Terrorist

January Challenge 2017: 

Capital Movement, Cats and Dogs, Reservior, Tourists in Mancunia

January Lunchtime 2017: 

Sealing up, Nothing in Common

February Lunchtime 2017: 

Bear and House Queries, Bear and Milky Cookies

Past INOI Problems: 

Triathlon, Table Sum, Calvins Game, Sequence Land, Highway Bypass, Special Sums, Periodic Strings, Free ticket, Wealth Disparity, Brackets

May Challenge 2017: 

Chef and Sub Array , Gotham PD, Chef and his daily routine, Courses in an university, Blocked websites, Median of adjacent maximum numbers, Chef and Subsequences

July Challenge 2017: 

Whats in the Name, Calculator , IPC Trainers

August Long Challenge 2017: 

Chef and Rainbow Array

April Cook-Off 2017: 

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

April Lunchtime 2017: 

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

June Lunchtime 2017: 

Maximum Unique Segment, Two Numbers, Company and Club Hierarchies

February Challenge 2018: 

Chef And His Characters, Car-pal Tunnel

March Challenge 2018 DIV 1: 

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

July Cook-Off 2018 Division 1: 

OR Matrix, Chef and GCD Game

July Lunchtime 2018 Division 1: 

Prime divisors

March Challenge 2019 Division 1: 

Yet Again a Subarray Problem

May Challenge 2019 Division 1: 

Where to Build the Roads

June Challenge 2019 Division 1: 

Lent Money, Chef and Ingredients, Intersecting Paths, Sum and GCD

January Challenge 2020 Division 1: 

Chef and Dynamo

May Challenge 2020 Division 2: 

Chef and Bitwise Product

October Challenge 2020 Division 2: 

Positive AND, Replace for X

February Challenge 2021 Division 3: 

Frog Sort, Team Name, Chef and Meetings, Prime Game, Maximise Function, Highest Divisor

March Challenge 2021 Division 2: 

Interesting XOR!, College Life 4, Space Arrays

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