Submission #42345368

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Source Code Expand

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		try (Scanner scanner = new Scanner(System.in)) {
			int n = scanner.nextInt();
			Map<Integer, List<Integer>> result = new HashMap<>();
			for (int i = 1; i <= 3 * n; i++) {
				int value = scanner.nextInt();
				List<Integer> list = result.computeIfAbsent(value, k -> new ArrayList<>());
				list.add(i);
			}

			result.entrySet().stream()
					.map(entry -> Map.entry(entry.getKey(), entry.getValue().get(1)))
					.sorted(Map.Entry.comparingByValue())
					.map(Map.Entry::getKey)
					.forEach(value -> System.out.print(value + " "));
		}
	}
}

Submission Info

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