Xuandi Ren

• Username: 7★rxdoi
• Country:  China
• Student/Professional:Student
• Institution:Shaoxing No.1 High School Zhejiang
• 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: 11

Current Ratings Graph Old Ratings Graph

2575 (+74)RatingProvisional
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January Challenge 2018(2018-01-15 15:00:00)

Global Rank:   27

Cheated in:   

Ratings System Update

(2018-01-15 15:00:00)

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2575 (+77)RatingProvisional
Rating i Provisional Rating, click to know more

January Challenge 2018(2022-12-20 00:00:00)

Global Rank:   27

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 (11)

February Challenge 2016

Chef and Strange Operations, Sereja and Two Lines, Call Center Schedule, Sereja and Permutations, Matrix Maximum Sum, Rectangles of Love, Chef-Detective, Devu and a light discussion

March Challenge 2016

Sereja and Two Strings 2, Tiptoe through the tulips, Chef And Special Dishes, Parity tree, maximize the sum, Floor Distribution, Palindromic substrings, Chef And Hungry Birds

May Challenge 2016

Sereja and GCD 2, Chef and math, Chef and Balls, Forest Gathering, Chef and Big Soccer, Laddu

July Challenge 2016

Defend the Recipe, Evaluate the polynomial, Chef and special numbers

February Challenge 2017

Primitive Queries

April Challenge 2017

Dish Of Life, Similar Dishes, Bear and Clique Distances, Bear and Row 01, Heavy-Light Decomposition, Stable market, Chef and Divisor Tree, Bear and Random Grid, (CH) Serejs and Billiards, Chef and Digits

May Challenge 2017

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

June Challenge 2017

Persistent oak, Chef and Prime Queries, Euler Sum, A Good Set, Cloning, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets

September Challenge 2017

Little Chef and Sums, Fill The Matrix, Weasel finds Staircase, Weasel does Xor on Tree, Sum of Cubes, Minimum Good Permutation, Chef and Pick Digit, Sereja and Commands, Querying on a Grid

April Lunchtime 2017

Bear and Digit Virus, Bear and Segments, Closest points queries, Bear and Segment 01

May Lunchtime 2017

Post Tree, SubInversing, Prefix Inversions

January Challenge 2018

Killing Monsters, A humongous Query, Simplify the Square Root, Killjee and k-th letter , K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers

Total Problems Solved: 163