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https://www.hackerrank.com/contests/leetcode-bootcamp-week-1/challenges/contains-duplicate-27-2/problem?isFullScreen=true 문제 안에 중복 요소 있으면 true, 다 unique 하면 false 답안 public static boolean containsDuplicate(List<Integer> nums) { Set<Integer> set = new HashSet<>(); for (int num: nums) { int beforeSize = set.size(); set.add(num); if (beforeSize == set.size()) { return true; } } return false; } 메모 Set 으로 체크하면 So 간단..
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[LC BC] Contains Duplicate 27. https://www.hackerrank.com/contests/leetcode-bootcamp-week-1/challenges/contains-duplicate-27-2/problem?isFullScreen=true 문제 안에 중복 요소 있으면 true, 다 unique 하면 false 답안 public static boolean containsDuplicate(List nums) { Set set = new HashSet (); for (int num: nums) { int beforeSize = set.size(); set.add(num); if (beforeSize == set.size()) { return true; } } return…
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