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My code
Map<Integer, List<Integer>> bookMap = new HashMap<>(); int pageNr = 1; for (int i = 0; i < n; i++) { List<Integer> problemsPerPage = new ArrayList<>(); for (int j = 0; j < arr.get(i); j++) { if (problemsPerPage.size() == k) { bookMap.put(pageNr, problemsPerPage); pageNr++; problemsPerPage = new ArrayList<>(); } problemsPerPage.add(j + 1); } bookMap.put(pageNr, problemsPerPage); pageNr++; } AtomicInteger specialProblems = new AtomicInteger(); bookMap.keySet().forEach(key -> { if (bookMap.get(key).contains(key)) { specialProblems.getAndIncrement(); } }); return specialProblems.get(); }
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Lisa's Workbook
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My code