Topic 24 — Intervals
Finished Wed, Sep 30, 2026, 3:53 PM ET: all 3 core problems closed, 3 problems closed that day.
Scheduled: Wed Sep 30, 2026 · Phase: Phase V — Decision Space · Topic: #26 · Builds on: Topic 23
Closed Sep 30 — the day the topic finished
| Issue | Problem | Set | Difficulty | Closed (ET) | Solution |
|---|---|---|---|---|---|
| #181 | LC 57 · Insert Interval | core | medium | Sep 30 | py · docs |
| #182 | LC 56 · Merge Intervals | core | medium | Sep 30 | py · docs |
| #183 | LC 435 · Non-Overlapping Intervals | core | medium | Sep 30 | py · docs |
Open at release
| Issue | Problem | Set | Difficulty | Closed (ET) | Solution |
|---|---|---|---|---|---|
| #184 | LC 253 · Meeting Rooms II | optional | medium | — | — |
| #185 | LC 228 · Summary Ranges | optional | easy | — | — |
| #186 | LC 452 · Minimum Arrows to Burst Balloons | optional | medium | — | — |
| #187 | LC 920 · Number of Music Playlists | optional | hard | — | — |
| #223 | LC 986 · Interval List Intersections | optional | medium | — | — |
20260930.195303.000000000 is timever for the UTC instant the core set completed; it tags e1c8f1a, the last main commit before it.