The 370 problems on DSA Tracker are a curated selection from three Indian sheets (Striver A2Z, Love Babbar 450, and Apna College). This page documents what maps to what, what is not included, and cites our verified re-check from 2026-10-05.
docs/research/sheet-recheck-2026-10-05.mdUnique across 22 topics
Across the 3 source sheets
Overlapping slots eliminated
Consensus core baseline
The three live sheets held a combined 1,133 rows when re-read from their own websites on 2026-10-05 (Striver A2Z: 495, Love Babbar 450: 445, Apna College: 193). Our dataset selects 370 problems across 22 topics, removing 297 duplicate slots across sheets. The selection is not an exact mirror of any single sheet: it unifies the core curriculum into a role-reorderable set with original notes and walkthroughs.
| Source Sheet | Live Rows (2026-10-05) | Mapped to DSA Tracker | Difference (Not in 370) |
|---|---|---|---|
| Striver A2ZLive website · Tracker page | 495 | 315 | 180 |
| Love Babbar 450Live website · Tracker page | 445 | 248 | 197 |
| Apna CollegeLive website · Tracker page | 193 | 104 | 89 |
| Total live rows / unique curated set | 1133 | 370 (unique) | 763 |
Striver A2Z had 495 live rows on 2026-10-05 (448 practice problems and 47 theory lessons, plus 16 contest rows not counted). Our dataset tags 315 problems. The difference (180) comprises the 47 theory lessons that have no practice page, plus problem variations not selected for our 370-problem set.
Love Babbar 450 lists 445 rows across 15 tables on its GeeksforGeeks page (although the page text states 450). Our dataset tags 248 problems. The difference of 197 rows represents problems not chosen for our curated set. Babbar rows use GeeksforGeeks descriptive titles rather than LeetCode names and require manual mapping to compare.
The Apna College sheet had 193 rows across 34 days on 2026-10-05 (Easy 41, Medium 117, Hard 35). Our dataset tags 104 problems. The difference of 89 rows represents live problems omitted from our 370 curated problems.
Across the three sheets there are 667 total question slots. Merging them eliminates 297 duplicate questions. 75 problems appear in all three sheets independently: this consensus set forms the core baseline that every software engineering interview loop expects.