rajkumar_831

• Username: 4★rajkumar_831
• Country:  India
• Student/Professional:Student
• Institution:National Institute of Technology, Jamshedpur Jharkhand, India
• CodeChef Pro Plan: No Active Plan. View Details

Submissions Heat Map

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

Rating Graph

No. of Contests Participated: 35

Current Ratings Graph Old Ratings Graph

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Starters 189 (Rated)(2025-06-04 22:00:02)

Global Rank:   63

Cheated in:   

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(2025-06-04 22:00:02)

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Starters 69 Division 3 (Rated)(2022-12-20 00:00:00)

Global Rank:   1387

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

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Contests (35)

Starters 50 Division 4 (Rated)

Discount

Starters 51 Division 4 (Rated)

Final Population, TV Discount

August Long 2022 Division 4 (Rated)

Sale Season, Maximum Submissions, Make A and B equal

Starters 52 Division 4 (Rated)

AI Analysing Code, Air Conditioner Temperature

Starters 54 Division 4 (Rated)

Equal Distinct, Number of Credits, Ticket Fine, Team of Two

Starters 55 Division 4 (Rated)

Balls and Boxes, Fever, Broken Phone

Starters 56 Division 4 (Rated)

Nearest Exit, Chefland Games, Far Away

September Lunchtime 2022 Division 4 (Rated) (Based on EJOI)

Sleep deprivation, Flip the cards, Equalize AB, Stick Break, Permutation Creation

Starters 57 Division 4 (Rated)

Alice and Marks, Integers that sum to the same value, Non-Negative Product, Two Different Palindromes

Starters 58 Division 4 (Rated)

Break the elements, Ranklist Pages, Reach the Target, Add to Subsequence, Remove Bad elements

Starters 60 Division 4 (Rated)

Expert Setter, Tax in Chefland, Paper Cutting, Palindrome Flipping, Card Removal

Starters 61 Division 4 (Rated)

Minimise LCS, Different Consecutive Characters , Subarray Removal, Reach on Time, Odd Sum Pair

Starters 62 Division 3 (Rated)

Sorted Substrings, Make Multiple, Final Sum, X Jumps, Test Score

Starters 65 Division 3 (Rated)

Nahaane Jaa, Candies, Hackerman

Starters 66 Division 3 (Rated)

Good Binary Strings, Palindrome by Splitting, Just Like Mob!, Binary Battles, Monopoly in Chefland

Starters 67 Division 3 (Rated)

Maximum Angriness, Expensive Steps , Minimum Number of Ones, Counting Problem

Starters 68 Division 3 (Rated)

Boring String, XOR Product, Expense List, Make AP, Make Money

Starters 69 Division 3 (Rated)

Akash and Dinner, Convert to permutation, Distinct Sequence

Starters 70 Division 3 (Rated)

Cost of Groceries, Minimum distance between 1s, Prime Reversal

Starters 71 Division 3 (Rated)

Pet Store, Snapchat, Perfect Trio

Starters 72 Division 3 (Rated)

Indivisible, Apples and oranges, N Triplets

Starters 73 Division 3 (Rated)

Find an integer, Consecutive Xor, Lucky Numbers, Append for OR

Starters 74 Division 3 (Rated)

Chef And Babla, Lcm hates Gcd, Odd Even Binary String

Starters 78 Division 3 (Rated)

Valid Expression, Passing Marks

Starters 79 Division 3 (Rated)

One Stone or Two Stones, Add smallest prime factor, Distinct Opposite Sums, Better Deal

Starters 80 Division 3 (Rated)

Permutation Subsequence, Prefix Permutation, Single-use Attack, Running Comparison, Equal Elements

Starters 83 Division 3 (Rated)

Chef Eren, Construct String

Starters 117 Division 3 (Rated)

Equality Etiquette, Spread Spree, Stingy Arrays, Not Prime Permutation, Weapon Choice, Spell Shortening

Starters 118 Division 3 (Rated)

Subset GCD, Literacy Rate, Join States, Is it uniquely decodable, Xorry 2, Xorry 1

Starters 119 Division 2 (Rated)

Cookie Day, Another Good String , K Odd Sum

Starters 120 Division 2 (Rated)

Find Permutation , Construct Permutation, Count Subarrays, Count Arrays, Sub or Swp

Starters 121 Division 2 (Rated)

Frequal, Caesar Cipher Lite, Anti Adjacent Swaps

Starters 123 Division 2 (Rated)

Maximise Adjacent Sum, Check Adjacent Sum, Minimum And Maximum I, Yet Another Alice Bob Game, Minimum And Maximum II

Starters 189 (Rated)

Number Walks, Nutrition Cost, Create Binary String, Avoid Primes, Sortable Subarrays (Easy)

Total Problems Solved: 137