Raj Kunwar Singh

• Username: 5★ruebenk
• Country:  Singapore
• Student/Professional:Student
• Institution:Queen Mary University
• 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: 24

Current Ratings Graph Old Ratings Graph

2016 (-59)RatingProvisional
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October Lunchtime 2015(2015-10-25 14:00:00)

Global Rank:   820

Cheated in:   

Ratings System Update

(2015-10-25 14:00:00)

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2016 (+171)RatingProvisional
Rating i Provisional Rating, click to know more

October Lunchtime 2015(2022-12-20 00:00:00)

Global Rank:   820

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 (24)

September Cook-Off 2014, ACM-ICPC Warm up

Sherlock and the Grid

October Cook-Off 2014

The Army, Walk on the Axis

August Challenge 2014

The Leaking Robot, Chef and Gift

September Challenge 2014

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

October Challenge 2014

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

November Challenge 2014

Chef and Segment Game, Chef and Words, Fombinatorial, Distinct Characters Subsequence, Chef and Red Black Tree, Let us construct palindrome, The Spelling Problem

December Challenge 2014

XOR with Subset, Sereja and GCD, Chef and Apple Trees, Alok-nath and His Sanskars, Chef Under Pressure

September Lunchtime 2014

Chef and easy problem

January Challenge 2015

Queries on the String, Sereja and Number Division 2, Chef and A Large Permutation, Sereja and LCM, Chef and Stones, Sereja and Votes, One Dimensional Kingdoms, Gcd Queries

January Cook-Off 2015

Suraj goes shopping

January Lunchtime 2015

Piece of cake

February Challenge 2015

Chef and Chain, Time to Study Graphs with Chef, Chef and Strange Formula, Chef and Strings, Let us play with rank list, Jigsaw Puzzle Solving, Chef and Equality

March Challenge 2015

Count Substrings, Sign Wave, Devu and his Class, Chef and Notebooks, Sereja and Random Array

June Challenge 2015

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

July Challenge 2015

Chef and Cube, Rohith and Circles, Na2a and lucky stone, MasterChef, Bread, Sereja and Game 2, Maximum Difference Walk, Addition and Multiplication

August Challenge 2015

Way Out, Gravity Guy, Devu And Churu , Cooking Machine, Aditi and Magic Trick, Chef and insomnia

September Challenge 2015

Filling the maze, Chef and Chetris, Cracking the Code, Lighthouses, Bank robbery, Count Steps in Matrix, Nikitosh and xor, Chain of Doughnuts, 3D Queries, Terrible vectors

February Cook-Off 2015

Fit Squares in Triangle

August Cook-Off 2015

Chef and the XORed Number , Chef and the Wildcard Matching

September Mega Cook-Off 2015

Forgotten Language, Stacks, Super Numbers

October Cook-Off 2015

Word Stem, Almost Sorted Permutation

August Lunchtime 2015

Churu and lost string, Make Palindrome, Minimum Maximum

October Lunchtime 2015

emitL

Total Problems Solved: 148