문제 난이도 : Easy

문제 유형 : Data Structures - Arrays

문제 설명 간략 :

array 반대로 출력하라.

제약사항

• 1 <= N <= 10^3
• 1 <= A[i] <= 10^4, where A[i] is the i^th integer in A

자바 풀이

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
import java.util.regex.*;
import java.util.stream.*;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;

class Result {

    /*
     * Complete the 'reverseArray' function below.
     *
     * The function is expected to return an INTEGER_ARRAY.
     * The function accepts INTEGER_ARRAY a as parameter.
     */

    public static List<Integer> reverseArray(List<Integer> a) {
        List<Integer> list = new ArrayList<Integer>();

        for(int i = a.size()-1; i >=0; i--) {
            list.add(a.get(i));
        }

        return list;

    }

}

public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        int arrCount = Integer.parseInt(bufferedReader.readLine().trim());

        List<Integer> arr = Stream.of(bufferedReader.readLine().replaceAll("\\s+$", "").split(" "))
                .map(Integer::parseInt)
                .collect(toList());

        List<Integer> res = Result.reverseArray(arr);

        bufferedWriter.write(
                res.stream()
                        .map(Object::toString)
                        .collect(joining(" "))
                        + "\n"
        );

        bufferedReader.close();
        bufferedWriter.close();
    }
}

출처

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