Submission #4830804

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Source Code Expand

import java.util.Set;
import java.util.stream.Collectors;

public class Main {
    private static java.util.Scanner scanner = new java.util.Scanner(System.in);

    public static void main(String[]$) {
        int n = scanner.nextInt();
        Set<Integer> a = java.util.stream.IntStream.range(0, n).map(i -> scanner.nextInt()).boxed().collect(Collectors.toSet());
        System.out.println(a.stream().filter(s -> s % 2 == 1 || !a.contains(s / 2)).count());
    }
}

Submission Info

Judge Result