Jun Ishibashi
- ishibashijun
Japan- Professional
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Learning Paths (0)
Practice Paths (4)
Jump from 2* to 3*
Level up from 1* to 2*
1000 to 1400 difficulty problems
500 to 1000 difficulty problems
Contests (77)
November Challenge 2013
Superpowers of 2, Uncle Johny, Square Digit Squares, Missing some chairs
December Challenge 2013
Chef and Codes, Funny Marbles, Magic Pairs, Reign, Rectangular Queries
January Challenge 2014
Please like me, Chef and Feedback
February Challenge 2014
Longest Common Pattern
March Challenge 2014
Walk
December Challenge 2016
Train Partner
December Lunchtime 2016
Superheroes and villains
January Challenge 2017
Cats and Dogs, Reservior
February Challenge 2017
Chef and His Apartment Dues, Most Frequent Element, Gerrymander
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number, Bandwidth of a matrix
January Lunchtime 2017
Nothing in Common
February Lunchtime 2017
Bear and Milky Cookies
April Challenge 2017
Dish Of Life, Bear and Row 01, Similar Dishes
May Challenge 2017
Chef and his daily routine, Median of adjacent maximum numbers
June Challenge 2017
A Good Set, Xenny and Coin Rankings
July Challenge 2017
Chef and Sign Sequences, Whats in the Name, Calculator
August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover, Greedy Candidates
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
October Challenge 2017
Max Mex, Counter Test For CHEFSUM, A Balanced Contest
November Challenge 2017
Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
December Challenge 2017
Chef And his Cake, Penalty Shoot-out, Chef and Hamming Distance of arrays
August Cook-Off 2017
Real obtuse, From heaven to earth
October Cook-Off 2017
Chef and Employment Test, Chef and Weird Queries
November Cook-Off 2017
Skiing, Online Chess
December Cook-Off 2017
Football Match
July Lunchtime 2017
Find the Maximum Value
August Lunchtime 2017
Mathison and pangrams
September Lunchtime 2017
Chef and Cook-Off Contests
October Lunchtime 2017
Buggy Calculator
November Lunchtime 2017
Smart Strategy
December Lunchtime 2017
Days in Month
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle
February Challenge 2018
Chef And His Characters, Chef And The Patents, Permutation and Palindrome
February Lunchtime 2018
Jumping in the hills
March Challenge 2018 DIV 2
A Big Sale, Mix the Colors, Chef and Glove, Minions and Voting, Minion Chef and Bananas
September Mega Cook-Off 2018 Division 2
ATM Machine, Make a Permutation
October Mega Cook-Off 2018 Division 2
Ada and the Staircase
December Cook-Off 2018 Division 2
Camp Or Not
April Lunchtime 2018 Division 2
Two vs Ten
April Challenge 2018 Division 2
Workers
May Challenge 2018 Division 2
Mighty Friend, Minimum Deletions, Xor Again
July Challenge 2018 Division 2
Magic Set, Strike or Spare
August Challenge 2018 Division 2
Problem Sort, Sheokand and Number, Spell Bob
September Challenge 2018 Division 2
Magician versus Chef, War of XORs, Chef and Adventures
December Challenge 2018 Division 2
Max and Electrical Panel, Chef and Interactive Contests, Chef and An Ideal Problem
November Challenge 2018 Division 2
Chef and Ridges, Appy Loves One, Chef and Difficult Contests, Chef and Happiness
August Lunchtime 2018 Division 2
Chef and Problem Setting, Chef and Eid
September Lunchtime 2018 Division 2
Judging Delay, Chef Restaurant
October Lunchtime 2018 Division 2
Three Friends, Coloring the Grid
December Lunchtime 2018 Division 2
Print Pattern, Age Calculator
January Challenge 2019 Division 2
Lucky Number Game, Chef and Modulo Game, Fancy Quotes
January Cook-Off 2019 Division 2
Ada School, Ada King
January Lunchtime 2019 Division 1
Distances, Rooks
February Challenge 2019 Division 1
Chef and Secret Ingredients, Art of Balance
February Cook-Off 2019 Division 2
Buying New Tablet, Chef and Party
February Lunchtime 2019 Division 2
Average Number
March Challenge 2019 Division 2
Chef got Recipes, Chef and Number Game, Chef and a Beautiful Digit
March Lunchtime 2019 Division 1
Travelling Saleschef
April Lunchtime 2019 Division 1
Minimum Sum
May Lunchtime 2019 Division 2 (Unrated)
Dummy Palindromic Strings, CV
June Challenge 2019 Division 2
Chef and Proxy
June Lunchtime 2019 Division 2
Ping Paja Pong, Magda and Silly Pairs
July Lunchtime 2019 Division 2
Easy Math
September Mega Cook-Off 2019 Division 2
Playing with Matches
September Lunchtime 2019 Division 2
Chef Feeds Cats, Chef and Football Match
October Mega Cook-Off 2019 Division 2
Cakewalk, Medel
October Lunchtime 2019 Division 2
Khaled in HIT
November Cook-Off 2019 Division 2
Chef Diet
November Lunchtime 2019 Division 2
Planting Trees, Compress the List
December Lunchtime 2019 Division 2
Stupid Machine, Check Algorithm
International Coding League 2019 (Rated for Division 2)
FlatLand, Too Many Candies, A Weird Device, Earning A Profit
January Cook-Off 2020 Division 2
Chef Chick
March Challenge 2021 Division 2
Interesting XOR!, Space Arrays