Week 11 (Aug 3 – Aug 9, 2026) — INTERVALS + MATH & GEOMETRY (Sprint S7 of 8)
14 problems. Redis playlist finishes this week. Timer on, solo.
→ Curriculum: [[Coach/project_dsa_sd_curriculum]] | Coach state: [[synthesis/Coach Hub]]
Goals This Week
DSA Problem Set (14)
| # | Problem | LC | Diff | Target | Solved? | Time | Notes |
|---|
| 1 | Insert Interval | 57 | M | 20 min | ☐ | | |
| 2 | Merge Intervals | 56 | M | 20 min | ☐ | | sort + merge |
| 3 | Non-overlapping Intervals | 435 | M | 25 min | ☐ | | greedy by end |
| 4 | Meeting Rooms | 252 | E | 15 min | ☐ | | sort + overlap |
| 5 | Meeting Rooms II | 253 | M | 25 min | ☐ | | min-heap of ends |
| 6 | Min Interval to Include Each Query | 1851 | H | 40 min | ☐ | | sort + heap |
| 7 | Rotate Image | 48 | M | 20 min | ☐ | | transpose+reverse |
| 8 | Spiral Matrix | 54 | M | 25 min | ☐ | | bounds shrink |
| 9 | Set Matrix Zeroes | 73 | M | 25 min | ☐ | | first row/col markers |
| 10 | Happy Number | 202 | E | 15 min | ☐ | | cycle detect |
| 11 | Plus One | 66 | E | 10 min | ☐ | | carry |
| 12 | Pow(x, n) | 50 | M | 20 min | ☐ | | fast exp |
| 13 | Multiply Strings | 43 | M | 30 min | ☐ | | grade-school mult |
| 14 | Detect Squares | 2013 | M | 30 min | ☐ | | count map of points |
Score: __/14 on time
SD + Redis + DDIA
| Item | Status | Notes |
|---|
| SD: Notification System | ⬜ | multi-channel, fan-out, retries, idempotency, rate caps |
| Redis: HA Sentinel | ⬜ | failover, quorum; playlist done |
| DDIA: Ch9 Distributed Troubles | ⬜ | unreliable clocks, network, partial failure |
Daily Plan (compact)
- Mon: LC 57, 56, 435
- Tue: LC 252, 253, 1851
- Wed: LC 48, 54 + Redis Sentinel (finish playlist)
- Thu: LC 73, 202, 66 + SD Notifications high-level
- Fri: LC 50, 43 + DDIA Ch9
- Sat: LC 2013 + Notifications whiteboard
- Sun: retro + scorecard + create S8 tracker
Decision Gate (Sun Aug 9)
| Score | Verdict | S8 |
|---|
| 11–14 | Pass strong | Bit Manip + KV store + theory finish + sprint retro |
| 8–10 | Patchy | Bit + patch weak buckets |
| <8 | Fail | Use S8 as catch-up, push KV store |
Hours Log
| Day | Planned | Actual |
|---|
| Mon–Sun | ~26h | |
Retro (fill Sun)
- Solved on time: __/14 | Weakest: __ | SD: __ | Redis: __ | DDIA: __ | S8 decision: __