Rajat shaily
144 posts


I'm probably doing everything except sleeping 8 hours a day.
Jigyasu Rajput@rajputwt
The biggest investment you can make in your 20s is in yourself. > But that book > Join a gym > Eat a high protein diet > Sleep 7-8 hrs a day > Make smart friends > Get good at thinking intuitively
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Day 101 💥
Trees + Recursion finally clicked 🌳
Now I don’t just code… I understand.
Break problem → trust recursion → solve clean.
Consistency is paying off. 🚀
#100DaysOfCode #DSA #Java #Backend

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Day 100/100 of #100DaysOfCode
Started with basics…
Today I understand:
API → Service → Database flow
Revised Spring Boot, DSA Trees & PostgreSQL (pgAdmin).
Not perfect, but far from where I started. 🚀

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@esperithm91153 This is amazing you have done the best things
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Day 99 🚀
Solved Longest Palindromic Substring using expand-around-center.
💡 Key learning:
Think in patterns, not brute force.
From O(n³) ➝ O(n²)
Cleaner logic. Better thinking.
Day 100 tomorrow 💯
#DSA #Coding #100DaysOfCode

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Day 98 — DSA
Lowest Common Ancestor (Binary Tree)
Insight:
If left ≠ null and right ≠ null → current node = LCA
Consistency > Motivation 🚀
#Day98 #DSA #Coding #Java #InterviewPrep

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Day 97 🚀
DSA + Java Multithreading ⚡
Understanding how threads execute in real systems
#Java #DSA #Consistency #100daysofdsa
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Day 96 🚀
Multithreading = multiple threads
Concurrency = managing multiple tasks
Learning. Improving. Repeating. 💪
#100DaysOfCode #Java #InterviewPrep

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Day 95 🚀
URL Shortener progress: redirection, clean architecture, scalability.
Showing up daily.
#Day95 #100DaysOfCode #Java #SpringBoot

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🚀 Day 94/100
Strings in DSA + Java Multithreading today ⚡
Learned how sliding window optimizes string problems
& how ExecutorService manages threads efficiently in backend systems
DSA + Backend = real growth 🔥
#100DaysOfCode #Java #DSA #BackendDevelopment

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Day 93
Focused on understanding > solving
Revised DSA + practiced a few problems
Deep dived into my URL Redirection project:
Short URL → Backend → DB → Redirect
Also finally understood Spring Boot Auto Config , just smart defaults based #BuildInPublic #SpringBoot #DS

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Day 92 🚀
Spring Boot (annotations, DI, flow), indexing + B-Trees, query optimizer, caching & latency.
DSA: 3 pointers (Dutch Flag) — O(n), in-place.
Focus: understanding > coding.
#Day92 #Backend #DSA #100daysofDSA

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Day 91/100 🚀
Solved a few medium DSA problems, focused on optimizing approach.
Revised: Sliding Window, Two Pointers, Queues (FIFO).
Also revisited my URL Redirection project (API → DB → response flow).
Consistency > Motivation.
#100DaysOfCode #DSA #Java #Backend

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Day 90/100 🎉
Indexed my thinking. Cached my effort.
💡 Indexing → faster queries
⚡ Caching → lower latency
🧠 DSA: Stack
• Next Greater Element
• Valid Parentheses
90 days of consistency. More to go 🚀
#100DaysOfCode #DSA #Backend

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Day 88
Reorder List done
Revised URL redirection project
Sliding window + two pointer revision
Practiced:
Longest Substring
Min Window
3Sum
Container Water
#DSA #100DaysOfCode

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🚀 Day 86–87
Linked List done with O(1) space optimization 🔗
→ Interleaving nodes
→ Smart pointer usage
→ Clean separation
•Practiced PostgreSQL
→ Joins, Group By, HAVING
→ Query optimization basic
Consistency building day by day 📈
#DSA #SQL #PostgreSQL #100DaysOfCode

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Day 85 🚀
Learned Stack & Queue basics + practiced Linked List problems 🔥
Getting better at pointer logic and data structure patterns
Consistency > everything 💪
#DSA #100DaysOfCode #CodingJourney

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