Combinations / Subsets Problems
40 Combinations / Subsets problems on LeetCode, a Backtracking interview pattern, ranked by importance (how often it comes up in real interviews). Difficulty (ELO) and importance shown per problem.
| # | PROBLEM | DIFF | ELO | IMP | PATTERNS |
|---|---|---|---|---|---|
| 1 | Subsets | Easy | 1211 | 92 | General Bit Manipulation |
| 2 | Combination Sum | Easy | 1317 | 90 | Unbounded Knapsack |
| 3 | Combinations | Easy | 1258 | 88 | |
| 4 | Generate Parentheses | Easy | 1375 | 85 | Linear Recurrence DP |
| 5 | Subsets II | Easy | 1361 | 84 | Sorting + Comparison |
MORE BACKTRACKING PATTERNS
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