LoopTracker
Day 23 / 56
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Every item in the 56-day loop. Filter by week, track, or status. Check off from here — done tasks stay in history.

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Showing 215 of 215

Day 1 · Baseline and arrays
Week 1 · Tue 13 Oct · Arrays
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Day 2 · Sliding window
Week 1 · Wed 14 Oct · Sliding window
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Day 3 · Two pointers
Week 1 · Thu 15 Oct · Two pointers
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Day 4 · Hash maps and prefix sums
Week 1 · Fri 16 Oct · Hashing
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Day 5 · Strings
Week 1 · Sat 17 Oct · Strings
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Day 6 · Stacks
Week 1 · Sun 18 Oct · Monotonic stack
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Day 7 · Week 1 retro
Week 1 · Mon 19 Oct · Retro
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Day 8 · Linked lists
Week 2 · Tue 20 Oct · Linked lists
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Day 9 · Heaps and top-K
Week 2 · Wed 21 Oct · Heaps
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Day 10 · Intervals
Week 2 · Thu 22 Oct · Intervals
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Day 11 · Binary search
Week 2 · Fri 23 Oct · Binary search
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Day 12 · Caching systems
Week 2 · Sat 24 Oct · Caching
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Day 13 · Queues and async
Week 2 · Sun 25 Oct · Queues
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Day 14 · Week 2 retro
Week 2 · Mon 26 Oct · Retro
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Day 15 · Binary trees
Week 3 · Tue 27 Oct · Trees
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Day 16 · BST and recursion
Week 3 · Wed 28 Oct · BST
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Day 17 · Graphs BFS and DFS
Week 3 · Thu 29 Oct · Graphs
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Day 18 · Topo sort and union-find
Week 3 · Fri 30 Oct · Graphs
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Day 19 · Rate limiter
Week 3 · Sat 31 Oct · Rate limiting
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Day 20 · URL shortener
Week 3 · Sun 1 Nov · URL shortener
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Day 21 · Week 3 retro
Week 3 · Mon 2 Nov · Retro
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Day 22 · 1D dynamic programming
Week 4 · Tue 3 Nov · DP
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Day 23 · 2D DP
Week 4 · Wed 4 Nov · DP
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Day 24 · Backtracking
Week 4 · Thu 5 Nov · Backtracking
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Day 25 · Advanced graphs
Week 4 · Fri 6 Nov · Graphs
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Day 26 · Newsfeed
Week 4 · Sat 7 Nov · Newsfeed
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Day 27 · Chat and messaging
Week 4 · Sun 8 Nov · Chat
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Day 28 · Week 4 retro
Week 4 · Mon 9 Nov · Retro
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Day 29 · Notification service
Week 5 · Tue 10 Nov · Notifications
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Day 30 · Search and typeahead
Week 5 · Wed 11 Nov · Search
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Day 31 · Upload and CDN pipeline
Week 5 · Thu 12 Nov · Blob pipeline
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Day 32 · Multi-tenant and identity
Week 5 · Fri 13 Nov · Multi-tenancy
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Day 33 · LLD core objects
Week 5 · Sat 14 Nov · LLD
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Day 34 · LLD scheduling
Week 5 · Sun 15 Nov · LLD
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Day 35 · Week 5 retro
Week 5 · Mon 16 Nov · Retro
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Day 36 · STAR inventory
Week 6 · Tue 17 Nov · Behavioral
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Day 37 · Growth mindset stories
Week 6 · Wed 18 Nov · Behavioral
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Day 38 · Conflict and customer
Week 6 · Thu 19 Nov · Behavioral
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Day 39 · Estimation drills
Week 6 · Fri 20 Nov · Estimation
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Day 40 · LLD polish
Week 6 · Sat 21 Nov · LLD
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Day 41 · Mixed senior signals
Week 6 · Sun 22 Nov · Mixed
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Day 42 · Week 6 retro
Week 6 · Mon 23 Nov · Retro
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Day 43 · Coding mock A
Week 7 · Tue 24 Nov · Mock
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Day 44 · Coding mock B
Week 7 · Wed 25 Nov · Mock
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Day 45 · System design mock A
Week 7 · Thu 26 Nov · Mock
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Day 46 · LLD mock
Week 7 · Fri 27 Nov · Mock
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Day 47 · Behavioral mock
Week 7 · Sat 28 Nov · Mock
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Day 48 · Half loop
Week 7 · Sun 29 Nov · Mock
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Day 49 · Week 7 retro
Week 7 · Mon 30 Nov · Retro
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Day 50 · Full loop A — coding
Week 8 · Tue 1 Dec · Mock loop
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Day 51 · Full loop B — design + behavioral
Week 8 · Wed 2 Dec · Mock loop
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Day 52 · Weak-pattern clinic
Week 8 · Thu 3 Dec · Clinic
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Day 53 · Polish
Week 8 · Fri 4 Dec · Polish
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Day 54 · Light day
Week 8 · Sat 5 Dec · Taper
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Day 55 · Rest / light review
Week 8 · Sun 6 Dec · Rest
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Day 56 · Final retro
Week 8 · Mon 7 Dec · Close
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