Farhan Ahmad Khan

• Username: 5★fkhan_iitbhu
• Country:  India
• Student/Professional:Student
• Institution:Indian Institute of Technology BHU Varanasi, Uttar Pradesh, India
• CodeChef Pro Plan: No Active Plan. View Details

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Last 6 Months 2026 (Jan-Jun)2025 (Jul-Dec)2025 (Jan-Jun)

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No. of Contests Participated: 34

Current Ratings Graph Old Ratings Graph

2019 (+32)RatingProvisional
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Starters 94 Division 2 (Rated)(2023-06-14 22:00:02)

Global Rank:   130

Cheated in:   

Ratings System Update

(2023-06-14 22:00:02)

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1616 (-80)RatingProvisional
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CodeChef Starters 10 Division 2 (Rated)(2022-12-20 00:00:00)

Global Rank:   2614

Cheated in:   

Ratings System Update

(2022-12-20 00:00:00)

This is the difference due to changing the rating system.This graph is not updated after 20th Dec 2022. Know more

How the rating system works?

Learning Paths (0)

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Practice Paths (0)

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Contests (34)

January Challenge 2015

Chef and Stones, Sereja and Votes

February Challenge 2015

Chef and Chain, Let us play with rank list, Chef and Equality

April Challenge 2015

Broken Telephone

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

November Challenge 2015

Eugene and function, Chef and cakes

April Challenge 2016

Chef and Ballons, Chef And Coloring

June Challenge 2016

Devu and an Array

September Challenge 2016

Chef and digits of a number, Faded Palindromes, Chef and calculation

October Challenge 2020 Division 2

Covid Run, Chef and Easy Queries

July Challenge 2021 Division 3 (Rated)

XxOoRr, Chef vs Bharat, Optimal Denomination, Maximum Production, Relativity, K Path Query

July Lunchtime 2021 Division 2

Beautiful Pairs, Array Rotation Returns

August Challenge 2021 Division 2 (Unrated)

Special Triplets, Array Filling, Chef and Bulb Invention, Problem Difficulties, Olympics Ranking

August Cook-Off 2021 Division 2

Different String, Chef and Closure, Equal Difference

August Lunchtime 2021 Division 2

K-th Maximum, Crossing Blocks, Just a Graph

CodeChef Starters 10 Division 2 (Rated)

Maximise the Subsequence Sum, Remove One Element

Starters 74 Division 2 (Rated)

Distinct Values, Lcm hates Gcd, Minimal Inversions, Odd Even Binary String

Starters 75 Division 2 (Rated)

Chefs Favourite Function, Equal Hamming Distance, Prefix Ones, Three Powers of Two

Starters 77 Division 2 (Rated)

Concat Palindrome, K Increment Palindrome, Three Numbers

Starters 78 Division 2 (Rated)

Bitwise Equation, Valid Expression, Solve More Problems!

Starters 79 Division 2 (Rated)

Love Squares Hate Cubes, One Stone or Two Stones, Add smallest prime factor, Distinct Opposite Sums, Better Deal, Ageing

Starters 80 Division 2 (Rated)

Permutation Subsequence, c8kbf and Tree, Prefix Permutation, Equal Elements

Starters 81 Division 2 (Unrated)

Good XOR, Distinct Matrix, Divide Pages

Starters 82 Division 2 (Rated)

Make Them Alike, Find eX, Make A-B Same, Difference Matrix, MIN To MAX

Starters 84 Division 2 (Rated)

SUM OR, Max count of 1, Digit Operation, Max Binary, Chef And Adjacent Sums

Starters 85 Division 1 (Rated till 6 stars)

Crazy Bishops on Chessboard, Efficient PAN Linking, TripTastic

Starters 86 Division 2 (Rated)

Minimum Operation, String Game , Largest Y, Maximise Score

Starters 83 Division 2 (Rated)

Construct String, Order by XOR

Starters 88 Division 1 (Rated till 6 Stars)

Maximum And Or, Chef and Asteroids

Starters 90 Division 1 (Rated till 6 Stars)

Crushed Apples and a Balance Scale, Sum of Goodness, Printing Binary Array, Anti Palindrome

Starters 91 Division 1 (Rated till 6 Stars)

Odd GCD Permutation, Chef Odd, Maximum Sum Permutation

Starters 92 Division 2 (Rated)

Rectangular Tiling, Dividing into Groups, Distance Coloring, Dotify Playlist

Starters 93 Division 2 (Rated)

Break Free, NASA, Problem

Starters 94 Division 2 (Rated)

CodeChef Streak, Possible or Not, Search for 404, The Vowel Matrix

Total Problems Solved: 179