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• Username: 5★sigma_yyf
• Country:  China
• Student/Professional:Other
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Last 6 Months 2025 (Jul-Dec)2025 (Jan-Jun)2024 (Jul-Dec)2024 (Jan-Jun)

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No. of Contests Participated: 18

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2000 (+17)RatingProvisional
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Starters 139 Division 2 (Rated)(2024-06-19 22:00:02)

Global Rank:   340

Cheated in:   

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(2024-06-19 22:00:02)

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2075 (+117)RatingProvisional
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Starters 47 Division 2 (Rated)(2022-12-20 00:00:00)

Global Rank:   327

Cheated in:   

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(2022-12-20 00:00:00)

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Contests (18)

Starters 40 Division 4 (Unrated)

Infinity Staircase, Difficulty Rating Order, Take discount or Not, Whatsapp Messages, Or Permutation, Good Pairs, Doubt Support Availability

Starters 41 Division 4 (Rated)

Equal Integers, Chef and Brain Speed, Chef and Chocolates, Remove and Add, Is this priority or parity!, Path Parity, Determine the Winner

June Cook-Off 2022 Division 4 (Rated)

Simple XOR, Rating Improvement, Playlist, Break the Stick, First and Last

Starters 42 Division 3 (Rated)

Minimum number of Flips, How Many Maximums, Minimum or Maximum, Maximise Set Bits , Divisible by 3

Starters 43 Division 2 (Rated)

Make them Equal, The Optimal Pairs, Permutation AND, Distinct Palindrome

Starters 45 Division 2 (Rated)

Retrieve the Array, Adjacent Sum Parity, KBG and GN-Theory, Xor and Multiply, Even Equal Odd

Starters 47 Division 2 (Rated)

Copy and Push Back, Similar Heights, End Sorted

Starters 77 Division 1 (Rated till 5 Stars)

Concat Palindrome, K Increment Palindrome, Three Numbers

Starters 84 Division 1 (Rated till 6 Stars)

Chef And Adjacent Sums, Max count of 1, SUM OR, Digit Operation

Starters 85 Division 1 (Rated till 6 stars)

Efficient PAN Linking, GCD Queries, TripTastic, Crazy Bishops on Chessboard

Starters 87 Division 1 (Rated till 6 Stars)

Inversions of subsequences, AB plus C

Starters 91 Division 1 (Rated till 6 Stars)

Odd GCD Permutation, Chef Odd, Maximum Sum Permutation

Starters 102 Division 1 (Rated till 6 Stars)

Parity Permutation, Bit Play, Chef Segment, Light The Bulb

Starters 106 Division 1 (Rated till 5 Stars)

Playing with OR, Save People, Guess the winner!, Count Possibilities

Starters 109 Division 1 (Rated till 5 Stars)

Minimum XOR, Chroma Swap

September Short 2023 Division 1 (Unrated)

GCD Discount, Ultimate Fencing, Lucky Seven, Slow Start, Mixing Extraordinaire

Starters 116 Division 2 (Rated)

Access Control, Exact Savings, ORST , Chef Product

Starters 136 Division 1 ( Rated till 6-Stars )

Sum of Max K Subarray, 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 2 (Rated)

Sum of N, Maximum Distance Permutations, Destroying Bridges Part 2

Total Problems Solved: 151