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public class Solution {
    public int distributeCandies(int[] candies) {
       List<Integer> list = new ArrayList<>();
        for (int candy : candies) {
            list.add(candy);
        }
        Set<Integer> set = new HashSet<>(list);
        return set.size() > candies.length/2 ? candies.length/2 : set.size();
    }
}