Top Tweets for #hashMap
LeetCode 169 looked easy…
until I realized it’s really a dominance problem ⚡
#DSA #LeetCode #Algorithms #HashMap #CodingInterview
99. Subsets
simple backtracking, take/nottake
100. Design Twitter
store posts, followersList, time
fetch top 10 posts with pq
handle the followee/following loop
#DSA #Recursion #Backtracking #HashMap #PriorityQueue
95. Detect Squares
map of map, 1 point constant, start with a square side, get counts for the rest 3 points, update ans
96. Reverse Linked List II
find left, reverse till right, connect list
#DSA #HashMap #Math #LinkedList
Day 136/365
Solved LeetCode Q3121 today.
Count the Number of Special Characters II.
A bit trickier than the previous version — order of appearance mattered this time.
Nice follow-up problem.
#26meDSAkhatam #buildinpublic #LeetCode #strings #hashmap
• Solved LeetCode - Minimum Window Substring 🪟
• Used sliding window + hashing for optimization ⚡
• Improved understanding of substring tracking logic 🧠
#100DaysOfCode #Java #DSA #SlidingWindow #HashMap #LeetCode #CodingJourney
Day 135/365
Solved LeetCode Q3120 today.
Count the Number of Special Characters I.
Mostly careful counting and character handling.
Quick and straightforward one.
#26meDSAkhatam #buildinpublic #LeetCode #strings #hashmap
I tried sorting characters directly 😵💫
LeetCode 451 only clicked
when I started sorting frequencies instead.
#DSA #LeetCode #Algorithms #HashMap #CodingInterview
91. Reconstruct Flight Path
sort, start with JFK, push and backtrack
92. Time Based Key-Value Store
push to map of vector O(1)
binary search Key-Values for timestamp O(logN)
#DSA #Sorting #DFS #Backtrack #HashMap #BinarySearch
82. Longest Increasing Path in Matrix
check four directions, pick maximum neighbor path, cache
83. Non-Cyclical Number
store sums in map, iterate
#DSA #Recursion #Memoization #DFS #Matrix #Array #Hashmap
Day 203: Fruit Into Baskets ⚡
Used Sliding Window + HashMap
Maintained at most 2 fruit types while expanding the window efficiently ✅
#LeetCode #SlidingWindow #HashMap #Cpp
I kept thinking this was a comparison problem 😵💫
LeetCode 49 became easier
when I stopped comparing strings directly.
#DSA #LeetCode #Algorithms #HashMap #CodingInterview
Day 62 of #100DaysOfCoding
Solved LeetCode 30 — Substring with Concatenation of All Words
• Practiced Sliding Window + HashMap
• Learned fixed-length substring matching
• Improved hard-level string problem-solving skills
#Java #DSA #LeetCode #SlidingWindow #HashMap
✅1. Two Sum (Hash Map (One Pass) > https://t.co/Of4Jz4vPlh)
#Day137 #TwoSum #DSA #Arrays #HashMap #TwoPointers #LeetCode #JavaScript #SystemDesign #SoftwareEngineering #365DaysOfCode #Algorithms #DataStructures #BuildInPublic #ProblemSolving
✅ 994. Rotting Oranges (Breadth First Search (BFS) > https://t.co/ZnhPWCaq5c)
#Day135 #DSA #Stack #HashMap #Queues #LeetCode #JavaScript #SystemDesign #SoftwareEngineering #365DaysOfCode #Algorithms #DataStructures #BuildInPublic #ProblemSolving
🚀 Back to Coding - @ali_In_bits
• Solved LeetCode - First Unique Character in a String 🔤
• Used HashMap for frequency counting ⚙️
• Improved understanding of string hashing concepts 🧠
#100DaysOfCode #Java #DSA #LeetCode #HashMap #Strings #CodingJourney
I kept trying to solve everything in one loop 😵💫
LeetCode 387 became much simpler
when I split it into phases.
#DSA #LeetCode #Algorithms #HashMap #CodingInterview
✅Next Greater Element II (Circular Array)
> https://t.co/LvZkHlDvTn
#Day134 #DSA #Stack #MonotonicStack #HashMap #Queues #LeetCode #JavaScript #SystemDesign #SoftwareEngineering #365DaysOfCode #Algorithms #DataStructures #BuildInPublic #ProblemSolving
This problem looks easy…
until duplicate mappings appear ⚠️
Solved LeetCode 205.
The real challenge is not comparison.
It’s consistency.
#DSA #LeetCode #Algorithms #HashMap #CodingInterview
31. Valid Binary Search Tree
min/max traverse
32. Kth Smallest Integer in BST
stack, bst constraints
33. Construct a Binary Tree from Preorder and Inorder Traversal
map, inorder start/end, preorder start/end
#DSA #BinaryTree #DFS #HashMap
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