Ravi Singh
- 5★s500
India- Professional
- Amazon Development Centre India Pvt Ltd
- No Active Plan. View Details
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Ratings System Update
(2025-01-22 22:00:00)Ratings System Update
(2022-12-20 00:00:00)Learning Paths (0)
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Practice Paths (0)
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Contests (99)
August Cook-Off 2021 Division 3
Equal Difference, Which Division, Team Formation
August Lunchtime 2021 Division 2
K-th Maximum, Just a Graph
CodeChef Starters 9 Division 3 (Rated)
Black cells in a chessboard, Large Square, Bus full of passengers
CodeChef Starters 14 Division 2 (Unrated)
Odd GCD, Diagonal movement, FIXFIX
September Lunchtime 2021 Division 2
Balanced and Unique Arrays, Yet another SOD problem
November Cook-Off 2021 Division 2
Product Pain, Missing Sums, Make it Divisible
CodeChef Starters 19 Division 2 (Rated)
Indivisible Permutation
CodeChef Starters 20 Division 3 (Rated)
Stable Sequence, Genes, Chef and Pal
C.O.D.E.R.S Division 2 (Rated)
The One On The Last Night
FizzBuzz Division 2 (Rated)
Magical Planks, Substring Minimum Function, Can_Reach
November Lunchtime 2021 Division 2
Expected Weight
SnackDown 2021 - Elimination Parallel (Rated for Div 2)
Yet another subarray problem, Remove Element
December Cook-Off 2021 Division 2
Median Minimization, Musical Chairs
December Lunchtime 2021 Division 2
Maximum Trio, Optimal Sorting, Romantic Reversals
Infinity 2k21 Division 2 (Rated)
Marbles
January Lunchtime 2022 Division 2
Subarray permutations, Prefix Zeros
CodeChef Starters 24 Division 2 (Rated)
Anti Palindrome, Avoid Contact, Divisors and Reciprocals, Yet Another Constructive Problem
CodeChef Starters 25 Division 2 (Rated)
Building Towers, Equal MEX, Points and Lines
February Cook-Off 2022 Division 2
Perfect Permutation, PerMEXuation , Prefix Permutation
CodeChef Starters 27 Division 2 (Rated)
String Reverse, Distinct Binary Strings, The product mystery
February Lunchtime 2022 Division 2
Four Equidistant Points on a Grid, Parallel Processing, Magnet Sort
CodeChef Starters 28 Division 2 (Rated)
Permutation Xority, Count the Holidays
CodeChef Starters 29 Division 2 (Rated)
String protocol, Plusle and Minun on Array, Increase 2 consecutive characters, Decomposition Reaction
March Long Two 2022, Division 2 (Unrated)
Missing Numbers, Same Parity Swaps in Binary Strings
CodeChef Starters 30 Division 2 (Rated)
Minimum Coloring, Gift Shop and Coupon, Balanced Reversals
CodeChef Starters 31 Division 2 (Rated)
XOR and AND, Alternating String, Sign Moves, The Unchanging OR
CodeChef Starters 32 Division 2 (Rated)
Maximize the Minimum, Finding Shoes, Flip Sorting
CodeChef Starters 33 Division 2 (Rated)
Distinct Dilemma, Broken Life, Non Adjacent Flips, Make Them Equal
CodeChef Starters 34 Division 2 (Rated)
Binary Mismatch, Average Array, Binary String Xor
May Cook-Off 2022 Division 2 (Rated)
Doubled Distances
Starters 37 Division 2 (Rated)
Dazzling Even-Odd Challenge, Beat the Average, Infernos, Maximum OR Minimum
Starters 38 Division 2 (Rated)
Good Pairs, Circular Track
May Lunchtime 2022 Division 2 (Rated)
Bucket and Water Flow , Equal After And
Starters 39 Division 2 (Rated)
Compress the Video, Crazy Substrings, Closest Vowels, Even Subarray XOR
Starters 40 Division 2 (Unrated)
Max Value of MST, Infinity Staircase, Doubt Support Availability, Or Permutation, Good Pairs, Whatsapp Messages
Starters 41 Division 2 (Rated)
Equal Integers, Black and White, Remove and Add, Is this priority or parity!, Path Parity
Starters 42 Division 2 (Rated)
Minimum or Maximum, Divisible by 3
Starters 44 Division 2 (Rated)
Atleast and Atmost, Dense Bracket Sequence
Starters 43 Division 2 (Rated)
The Optimal Pairs, Distinct Palindrome
Starters 51 Division 2 (Rated)
Split N, Copy and Paste, Different Medians
Starters 61 Division 2 (Rated)
Minimise LCS, Weird Subarrays, Subarray Removal
Starters 63 Division 2 (Rated)
Maximize 1s, One-XOR Deletions, Make Length 1, Minimum Absolute Score, Greedy Grid Moves
Starters 64 Division 2 (Rated)
Luigi and Uniformity, Range Assign, Number of Distinct Elements Minimize, Distinct Neighbours
Starters 65 Division 2 (Rated)
Nahaane Jaa, Candies, Binod
Starters 66 Division 2 (Rated)
Good Binary Strings, Palindrome by Splitting, Just Like Mob!
Starters 67 Division 2 (Rated)
Maximum Angriness, Expensive Steps , Counting Problem
Starters 71 Division 2 (Rated)
Pet Store, Flip the Prefix, Maximizing LCS
Starters 73 Division 2 (Rated)
Minimum OR Path, Find an integer, Consecutive Xor, Append for OR
Starters 74 Division 2 (Rated)
Maximum Xor Sum, Lcm hates Gcd, Odd Even Binary String
Starters 75 Division 2 (Rated)
Equal Hamming Distance, Prefix Ones, Three Powers of Two
Starters 77 Division 2 (Rated)
Yet Another XOR Sort, Concat Palindrome, Three Numbers
Starters 79 Division 2 (Rated)
One Stone or Two Stones, Add smallest prime factor, Distinct Opposite Sums
Starters 85 Division 2 (Rated)
Crazy Bishops on Chessboard, Efficient PAN Linking, Inside The Stadium, TripTastic
Starters 86 Division 2 (Rated)
String Game , Largest Y, Maximise Score
Starters 89 Division 2 (Rated)
Plus 2 or Minus 1, Positive or Negative Subarrays, Subarray Removal, Two Averages
Starters 94 Division 2 (Rated)
CodeChef Streak, Possible or Not, Search for 404, Special Operation, The Vowel Matrix
Starters 96 Division 1 (Rated till 5 Stars)
Swap the numbers, Mex Array
Starters 97 Division 1 (Rated till 6 Stars)
No Palindrome, Triplets Min
Starters 98 Division 2 (Rated)
Airport Management, Ball Distribution
Starters 100 Division 2 (Rated)
Stamps 100, Concussive Sequence
Starters 101 Division 2 (Rated)
Minimize Xor Difference, Warrior Chef, Lockpicking Chef
Starters 102 Division 1 (Rated till 6 Stars)
Parity Permutation, Light The Bulb, Chef Segment, Bit Play
Starters 103 Division 1 (Rated till 6 Stars)
Squarified, Unique xor, Divisible By 8
Starters 106 Division 2 (Rated)
Playing with OR, Save People, Guess the winner!, Count Possibilities
Starters 109 Division 1 (Rated till 5 Stars)
Minimum XOR, Alter Ego, Chroma Swap
September Short 2023 Division 2 (Unrated)
GCD Discount, Ultimate Fencing, Lucky Seven, Slow Start, Mixing Extraordinaire
Starters 110 Division 1 (Rated till 5-stars)
Marbles, Am I Lucky!, Monsters, Tetris
Starters 118 Division 1 (Rated till 5-Stars)
Join States, Is it uniquely decodable, Xorry 2, Xorry 1
Starters 119 Division 1 (Rated till 6-Stars)
K Odd Sum, Xorred, Unalike Gcd & Lcm
Starters 120 Division 1 (Rated till 6 Stars)
Find Permutation , Count Subarrays, Count Arrays
Starters 121 Division 1 (Rated till 6-Stars)
Frequal, Split And Maximize, Caesar Cipher Lite
Starters 122 Division 1 (Rated till 6-Stars)
Arya In Grid, Transformation Cost
Starters 123 Division 1 (Rated till 6-Stars)
Minimum And Maximum I, Minimum And Maximum II
Starters 124 Division 1 (Rated till 5-Stars)
Swap and Unite, Make It One, How many arrays
Starters 125 Division 1 (Rated till 6-Stars)
Bucket Game, Binary Minimal
Starters 126 Division 1 (Rated till 6 Stars)
Tree Distance Set, Freedom, Triangular Swaps
Starters127 Division 1
Array Operations, ABC Conjecture, Anti-Triangle
Starters 128 Division 1 (Rated till 6-Stars)
Binary Substring, XOR And Multiply
Starters 129 Division 1 (Rated till 5-Stars)
Palindromic Substrings
Starters 130 Division 1 ( Rated till 6-Stars)
Make Equal, Good Binary String
Starters 131 Division 1 (Rated till 5 Stars)
K-Closeness, Encrypt Value, T-Perm
Starters 132 Division 1 (Rated till 6 Stars)
ALIEN-OR, Optimal Flip, MEX QUERIES , Prime Query
Starters 133 Division 1 (Rated till 6-Star)
ABC Conjecture 3, Powered Parameters, Too Far For Comfort (Easy Version)
Starters 135 Division 1 (Rated till 5-Stars)
Change A to B
Starters 136 Division 1 ( Rated till 6-Stars )
Lexicographically Maximal Prefix AND, Sum of Modes
Starters 138 Division 1 (Rated till 6-Stars)
A power B mod C , TRIPLE PRIMES, Prefix Suffix Inequality, Distinct Substring
Starters 139 Division 1 (Rated till 5-Stars)
Sort Perm, Sum of N, Destroying Bridges Part 2
Starters 140 Division 1 (Rated till 5-Stars)
Split Permutation, Trick Or Treat, Break The String, Tree Removal
Starters 141 Division 1 (Rated till 5-Stars)
Amphibian Escape, Perfect Prefixes
Starters 142 Division 1 (Rated till 5-Stars)
Array Removal, Number Hunt
Starters 144 Division 1 (Rated)
Largest K
Starters 145 Division 1 (Rated till 6-Stars)
Make Bob Win , Square String
Starters 146 Division 1 (Rated till 5 stars)
Back Front, Bouncing Ball, Permutation Construction
Starters 147 Division 1 (Rated till 5 stars)
K Subsequence 101, Truth Teller And Liars 101, Independence Day 101, Non-Primes 101, Gold Coins 101
Starters 149 (Rated till 5 stars)
Kill Monsters (Hard Version), Maximise Sum, Chef Loves Beautiful Strings (Easy Version)
Starters 150 (Rated till 6 stars)
Equal Pairs (Hard), Min Ops (Hard), Replacing Game
Starters 151 (rated till 5 stars)
Ball Game, Sequence Search
Starters 152 (Rated till 6 stars)
Completion (Hard), Maximize Hamming Distance, Completion (Easy), Anti-Palindrome Queries
Starters 153 (Rated till 5 stars)
Another Game, Colorful Tree (Easy Version)
Starters 156 (Rated till 6 stars)
Balance Difficulties, Interval Cliques, Partition Score