AJAY KUMAR

• Username: 1★only_i
• Country:  India
• Student/Professional:Student
• Institution:Birla Institute of Technology Mesra Ranchi, 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: 15

Current Ratings Graph Old Ratings Graph

1357 (+25)RatingProvisional
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June Lunchtime 2018 Division 2(2018-06-30 22:30:05)

Global Rank:   1265

Cheated in:   

Ratings System Update

(2018-06-30 22:30:05)

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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1357 (-37)RatingProvisional
Rating i Provisional Rating, click to know more

June Lunchtime 2018 Division 2(2022-12-20 00:00:00)

Global Rank:   1265

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?

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Contests (15)

October Cook-Off 2014

Walk on the Axis

September Challenge 2014

Chef and Left-Right

October Challenge 2014

Chef and Ground, Magical Girl and Colored Liquid Potions

November Challenge 2014

Distinct Characters Subsequence

December Challenge 2014

Chef and Apple Trees

October Lunchtime 2014

Tanu and Head-bob

January Challenge 2015

Chef and Stones

April Challenge 2015

Broken Telephone

March Challenge 2016

Palindromic substrings

June Challenge 2016

Devu and an Array

June Lunchtime 2018 Division 2

Counting Pretty Numbers

Total Problems Solved: 54