Sabbir Rahman (Abir)

May Challenge 2018 Division 2

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

June Challenge 2018 Division 2

Vision, Sheokand and String, Binary Shuffle, Naive Chef

December Challenge 2018 Division 1

(Challenge) Delete DAG, Colorblind Feast, Max and Electrical Panel, Directing Edges, Chef and Interactive XOR

January Challenge 2019 Division 1

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

June Cook-Off 2019 Division 1

Zawad and Index Sum

August Challenge 2019 Division 1

Guddu and his Mother, Encoding, Dilemma, Maximize an Expression, Chef and Gordon Ramsay, Complement Spanning Trees

November Lunchtime 2019 Division 1

Perfection, Planting Trees, Team Trees, Washing Windows

February Challenge 2020 Division 1

Chef and Railway Stations, Expected Change, No Change Required

August Challenge 2020 Division 1

Subsequence Frequency Counting, Smallest KMP, Chef and Wedding Arrangements

December Challenge 2020 Division 1

Hail XOR, Square Root of LCA Convolution, String Operations, Positive Prefixes, Even Pair Sum

December Cook-Off 2020 Division 1

Self-Destructing Strings, Carry All Fruits, Circle of Chaos, Sed Passwords

December Lunchtime 2020 Division 1 (Unrated)

K-Tuple Tree, Even Sequence, Three Letters, One Zero Swaps

UWCOI 2021 (Rated for all)

Organisation, Array Swaps, Efficient Delivery, Hidden Numbers, Binary Puzzle

Problems Authored (4)

Problems Tested (0)

No Contribution

Editorials Contributed (1)