Song Chol Ju
- 7★redstar06
North Korea- Student
- University of Sciences, D.P.R Korea
- No Active Plan. View Details
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Ratings System Update
(2025-07-13 23:00:00)Ratings System Update
(2022-12-20 00:00:00)Learning Paths (0)
None
Practice Paths (0)
None
Contests (13)
December Challenge 2021 Division 3 (Rated)
Increasing String , Yet Another Tree Problem, Check Mate, Valleys and Hills, Rock Paper Scissors, Pyramid Traversal, List of Lists, Min Manhattan Distance, Utkarsh and Placement tests, Squares Counting
December Cook-Off 2021 Division 2
Median Minimization, Binary String Game, Musical Chairs
December Lunchtime 2021 Division 2
Maximum Trio, Optimal Sorting, Romantic Reversals, Sleep Technique
January Long 2022 - I, Division 1 (Unrated)
Sequence Master, Generating Cycles, Retrieve back the Array, Chef and Riffles
January Long 2022 - II, Division 1 (Unrated)
Array Partition, Power Sum, Tree Master, Sum and OR, Crying Colours
February Long 2022 - I, Division 1 (Unrated)
Random OR, Digit Multiplication By K, Binary Base Basics, Bitwise Blend, Remove Adjacent
February Long 2022 - II, Division 1 (Unrated)
Sequence GCD, Area Sums in Convex Polygons, Bitwise swaps, Xor Palindrome
March Long One 2022, Division 1 (Unrated)
Subarray XOR, Substring of a Substring, Count the Ones, Exact Marks, MEX on Trees
March Long Two 2022, Division 1 (Unrated)
Minimum Longest Substring, Same Parity Swaps in Binary Strings, Kostomuksha and AESC MSU, Perfect Imperfections 2
April Long One 2022 Division 1 (Unrated)
Yet Another Mex Problem, Dazzling AXNODR Challenge , Bullets and Enemies, Min Max Equality, Pairwise Xors
April Long Two 2022 Division 1 (Unrated)
Geometric Mean Inequality, Antipodal Points, Flip to Invert, Chef And Division
May Long One 2022 Division 1 (Unrated)
Mystical Numbers, In The Green Zone, The Magical Stone, Alternating Diameter, Four Arrays
June Long One 2022 Division 1 (Unrated)
Full Path Eraser, Expected move, Reduce to zero, Add By Permutation, Divisible by i , Possible GCD
June Long Two 2022 Division 1 (Unrated)
Counting Is Fun, Gcd and Lcm , AP Grid, The Subarray XOR, Reversal Sorting
July Long One 2022 Division 1 (Unrated)
Largest Square in the garden, Expected Difference, Game of Piles Version 1, Game of Piles Version 2, Find A, B, C
July Long Two 2022 Division 1 (Unrated)
Maximize Difference, Concat Sort, Sum of Product 2, Similar Subsequence
August Long 2022 Division 1 (Unrated)
Angled Flip, Tree of Trees, XOR with smallest element, Hello Equation, Crazy Subsequences
September Long 2022 Division 1 (Unrated)
Yet Another Chef And Numbers, Distinct Numbers, Pokemon Battles, Alone Alice!, Interesting Subarray
October Long 2022 Division 1 (Unrated)
A drawing game, Chef And Array Construction, Twos and Zeros, Binary Substituition
Starters 64 Division 1 (Rated till 5-stars)
Luigi and Uniformity, Square Sort, Xor Array, Prime Factor Division, Planning the Trip, Distinct Neighbours
Starters 65 Division 2 (Rated)
Coordinate Points, Nahaane Jaa, Paisa Double, Candies, Binod, Gormint Aunty, Potato to Gold
November Long 2022 Division 1 (Unrated)
MaxEdges, Minimize swaps, Minimum BFS Length, Alice and the Array
December Long 2022 Division 1 (Unrated)
Counting Subsequences, Not Divisible, Break into Powers, Sum of Cube , Divisible by A_i
January Long 2023 Division 1 (Unrated)
A Short Counting Problem, Swap Shift, Maximum of GCDs, Symmetric Swaps, Minimize the Maximum
Starters 85 Division 1 (Rated till 6 stars)
Crazy Bishops on Chessboard, Efficient PAN Linking, GCD Queries, Bomb Blast, TripTastic
Starters 86 Division 1 (Rated for All)
Trees Are Fun, Least Size, Minimum Operation, String Game , Largest Y
Starters 87 Division 1 (Rated till 6 Stars)
Count the Permutations (always), Checkpoint, Inversions of subsequences, AB plus C, One or All
Starters 97 Division 1 (Rated till 6 Stars)
Make It Special, Unreachability Cost, No Palindrome, Triplets Min
Starters 98 Division 1 (Rated till 6 Stars)
3-Blast Palindrome, Happiness , Build Towers, Ball Distribution, Some Queries
August Long 2023 Division 1 (Unrated)
Codechef Copy, Spiritual Chef, All New CodeChef, Maximum Deliciousness, I Can Use Both Hands!
Starters 113 Division 1 (Rated)
Count Distinct Arrays, Counting Is Fun, Maximise The Minimum, Minimise Maximum Subarray Sum, Make All Equal, Score Sum, Maximum Score
Starters 193 (Rated for all)
Mex Tree (Min), Shop Game (Easy), Add Permutation
Starters 194 (Rated for all)
Speedrunning (Easy), Speedrunning (Medium), Munchys Modulo, Speedrunning (Hard), Good Arrays (Cyclic)
Starters 195 (Rated till 5 star)
Bugged Robot