Abhijit

🐍 GenAI Explorer | 🛠️ Shipping in Public
Traded my Java boilerplate for LLM prompts.
💼 Seeking my next big challenge.
💻 Coding daily (or dying trying)

[Abhijit @AbhijitCodex]

@PranaviMehta Congratulations 🎉 510 is a good score

[Abhijit @AbhijitCodex]

Day 66 of #100DaysOfCode

Solved Fancy Sequence.

Key idea: treat operations as an affine transform x → ax + b.
Used lazy updates with global mul and add, and modular inverse when appending.

Nice math + data structure trick 🔥

#leetcode #coding

[Abhijit @AbhijitCodex]

Day 64 & 65 of #100DaysOfCode

• Day 64: Complement of Base 10 Integer — simple bit mask + XOR trick.
• Day 65: Graph problem with spanning tree stability using Binary Search + DSU.

#leetcode #coding

[Abhijit @AbhijitCodex]

Day 62 & 63 of #100DaysOfCode

Solved two DP #POTDs on Stable Binary Arrays.

• Yesterday: Stable Binary Arrays I
• Today: Stable Binary Arrays II

Used DP with states tracking zeros/ones used and last element, subtracting cases that exceed the limit of consecutive bits.

[Abhijit @AbhijitCodex]

Day 61 of #100DaysOfCode

Solved Find Unique Binary String.

Used Cantor’s diagonal idea: flip the i-th bit of the i-th string to construct a new binary string that must differ from every given one.

Simple and clever trick problem 🔍

#leetcode #coding

[Abhijit @AbhijitCodex]

Day 60 of #100DaysOfCode
Solved Minimum Number of Flips to Make the Binary String Alternating.
Key idea: rotations matter, so treat the string as circular (s + s) and use a sliding window to compare with 0101... and 1010....

Nice mix of sliding window + string logic 🔁
#leetcode

[Abhijit @AbhijitCodex]

Day 59 of #100DaysOfCode

Solved Check if Binary String Has at Most One Segment of Ones.

Idea: once a 0 appears after the first 1 segment, seeing another 1 means a second segment exists → return False.

Simple scan, O(n) solution ✅

#leetcode #coding

[Abhijit @AbhijitCodex]

@ManasCodeXart Done bro 😁

[Abhijit @AbhijitCodex]

Day 58 of #100DaysOfCode
Solved Minimum Changes to Make Alternating Binary String.
Noticed there are only two valid patterns: 0101... and 1010....
Count mismatches for both and take the minimum.
Simple observation, clean O(n) solution ✅
#leetcode #coding #buildinpublic

[Abhijit @AbhijitCodex]

Day 57 of #100DaysOfCode
Solved Special Positions in a Binary Matrix.
Counted 1s in each row and column first, then checked cells where
mat[i][j] = 1 and both row & column counts are exactly 1.
Simple counting + matrix traversal ✅
#leetcode #CodingJourney

[Abhijit @AbhijitCodex]

Day 56 of #100DaysOfCode
Worked on Sudoku Solver today 🧩
Started with basic backtracking, optimized it using row/column/box sets for O(1) checks.
Big difference in performance!
Nice reminder that pruning matters in recursion 🔥
#coding #programming

[Abhijit @AbhijitCodex]

Day 55 of #100DaysOfCode
Today’s POTD: Partitioning Into Minimum Number of Deci-Binary Numbers 🔢
Instead of memorizing the trick, I simulated the construction layer by layer.
Each pass subtracts 1 from non-zero digits.
Realized the answer equals the max digit.
#Coding #LeetCode

[Abhijit @AbhijitCodex]

Day 54 of #100DaysOfCode
Today’s POTD: Concatenation of Consecutive Binary Numbers
Instead of building a huge binary string, kept shifting the result left by bit length and adding current number.
Tracked bit growth at powers of two.
Bit manipulation + modulo trick ✅
#leetcode

[Abhijit @AbhijitCodex]

Day 53 of #100DaysOfCode
Tried today’s Hard #POTD (Minimum Operations to Equalize Binary String) — couldn’t crack it after multiple attempts. Tough parity + edge case problem.
Didn’t stop there though 💪
Solved “Remove Nth Node From End” instead using two pointers in one pass.

[Abhijit @AbhijitCodex]

Day 51 & 52 of #100DaysOfCode
Yesterday forgot to post 😅
Solved:
• Sort Integers by Number of 1 Bits – custom sort by bit count
• Reduce Binary to One – right-to-left carry simulation
Bit manipulation streak continues 🔥
#leetcode #coding

[Abhijit @AbhijitCodex]

Day 50 of #100DaysOfCode
Today’s POTD: Sum of Root to Leaf Binary Numbers 🌳
Use DFS, build number with (curr<<1)|val, add when reaching leaf.
Bit + Tree combo ✅
#leetcode #coding

[Abhijit @AbhijitCodex]

Day 49 of #100DaysOfCode
Solved today’s POTD – Check If a String Contains All Binary Codes of Size K ✅
Idea: there are 2^k possible binary codes.
Slide a window of size k, track unique patterns, and verify count.
Nice mix of sliding window + bit thinking 🔥
#leetcode #coding

[Abhijit @AbhijitCodex]

Day 48 of #100DaysOfCode

Yesterday missed the POTD (Prime Number of Set Bits),
so solved it today along with today’s POTD – Binary Gap ✅
Both were bit manipulation based problems.
Small questions, but good practice for thinking in bits.

#leetcode #coding #programming

[Abhijit @AbhijitCodex]

Day 47 of #100DaysOfCoding 🚀
Built a reproducible crack detection pipeline using PyTorch + SDNET2018.
Baseline ResNet18 hits 92% val acc.
Next: stats + multi-seed.
#PyTorch #SDNET #RESNET18 #CodingJourney

[Abhijit @AbhijitCodex]

Day 46/100 #100DaysOfCode

Pushed to 30 epochs on DeiT-tiny with IDRiD dataset (Indian DR grading).

Train Acc: ~85%
Val Acc: ~62% (after tweaks)

Models, curves & history saved locally. Momentum building! Next: Grad-CAM + fairness metrics 🔥
#PyTorch #ComputerVision #MedicalAI