Daniel To

• Username: 4★lo_thecatalyst
• Country:  Vietnam
• Student/Professional:Student
• Institution:University of British Columbia
• CodeChef Pro Plan: No Active Plan. View Details

Submissions Heat Map

Last 6 Months 2025 (Jul-Dec)2025 (Jan-Jun)2024 (Jul-Dec)2024 (Jan-Jun)

Rating Graph

No. of Contests Participated: 35

Current Ratings Graph Old Ratings Graph

1883 (-44)RatingProvisional
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February Challenge 2020 Division 1(2020-02-17 15:00:00)

Global Rank:   964

Cheated in:   

Ratings System Update

(2020-02-17 15:00:00)

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1883 (+127)RatingProvisional
Rating i Provisional Rating, click to know more

February Challenge 2020 Division 1(2022-12-20 00:00:00)

Global Rank:   964

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 (35)

June Challenge 2017

A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets

July Challenge 2017

Chef and Sign Sequences, Whats in the Name, Calculator , IPC Trainers

August Long Challenge 2017

Chef and Rainbow Array, Chef and Mover, Palindromic Game, Greedy Candidates

September Challenge 2017

Sereja and Commands, Chef and Pick Digit, Minimum Good Permutation, Fill The Matrix, Little Chef and Sums

October Challenge 2017

Max Mex, Counter Test For CHEFSUM, A Balanced Contest

November Challenge 2017

Chef Hates Palindromes, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes

December Challenge 2017

Total Diamonds, Chef And his Cake, Penalty Shoot-out, Chef and Hamming Distance of arrays

June Cook-Off 2017

Ada and crayons, SnackUp

July Cook-Off 2017

Chang and the Perfect Function

September Cook-Off 2017

Statistics Construction, Subsequence Equality

May Lunchtime 2017

Prefix Inversions

June Lunchtime 2017

Two Numbers

August Lunchtime 2017

Mathison and the Dynamo shuffle, Mathison and pangrams

January Challenge 2018

(Challenge) Chef and Palindromes, K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers

January Cook-Off 2018

Multiple of 3, Survive in ChocoLand

January Lunchtime 2018

Chef and Game with Sequence, Chef and Escaping from the Labyrinth

February Challenge 2018

Broken Clock, Chef And His Characters, Chef And The Patents, Car-pal Tunnel, Permutation and Palindrome

February Cook-Off 2018

Chef and Cook-Off, Chef and Tuples

February Lunchtime 2018

Game with numbers, Jumping in the hills

March Challenge 2018 DIV 1

Pishty and Triangles, Chef and Easy Problem, Mix the Colors, Minions and Voting

March Cook-off 2018 Division 1

Chef Goes to the Cinema, Chef Restores a Matrix

April Cook-off 2018 Division 1

Binary Nim

May Cook-off 2018 Division 2

Best Cake Ever, Secret Recipe

December Cook-Off 2018 Division 1

Yalalovichik Numbers, Yalalovichik Strings

March Lunchtime 2018 Division 1 (Unrated)

Three Integers, Magic Elements

April Challenge 2018 Division 1

Count Good Prefixes

May Challenge 2018 Division 2

Mighty Friend, Change the Signs, Minimum Deletions, Xor Again, Dibs on Fibs

December Challenge 2018 Division 1

Max and Electrical Panel, Directing Edges, Chef and Interactive XOR

Insomnia 2018 (Rated)

Split Sums, Strange Swaps

December Lunchtime 2018 Division 1

Choosing from Buckets, Drawing Lines, Age Calculator

January Challenge 2019 Division 1

Yet Another Problem About Sequences, Different Neighbours, Partition the Graph, Distinct Pairs, A Pizza Slice

January Cook-Off 2019 Division 1

Ada School, Ada Matrix

February Challenge 2019 Division 1

Manhattan Rectangle, Chef and Secret Ingredients, Art of Balance

February Cook-Off 2019 Division 1

Max Range Queries, Chef and Party

April Challenge 2019 Division 1

Playing with Numbers, Subtree Removal

June Challenge 2019 Division 1

Lent Money, Chef and Ingredients, Sum and GCD

February Challenge 2020 Division 1

No Change Required

Total Problems Solved: 117