hackerrank/arrays/Left Rotation

https://www.hackerrank.com/challenges/ctci-array-left-rotation/problem?h_l=interview&playlist_slugs%5B%5D=interview-preparation-kit&playlist_slugs%5B%5D=arrays 

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 {

    public static List<Integer> rotLeft(List<Integer> a, int d) {
        int rest = d % a.size();
        List<Integer> first = a.subList(rest, a.size());
        List<Integer> last = a.subList(0, rest);
        
        List<Integer> joined = new ArrayList<>();
        joined.addAll(first);
        joined.addAll(last);

        return joined;
    }

}

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")));

        String[] firstMultipleInput = bufferedReader.readLine().replaceAll("\\s+$", "").split(" ");

        int n = Integer.parseInt(firstMultipleInput[0]);

        int d = Integer.parseInt(firstMultipleInput[1]);

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

        List<Integer> result = Result.rotLeft(a, d);

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

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

 

같은 문제 파이썬 풀이 추가)

#!/bin/python3

import math
import os
import random
import re
import sys


def rotateLeft(d, arr):
    front = arr[:d]
    back = arr[d:]
    return back + front
    
if __name__ == '__main__':
    fptr = open(os.environ['OUTPUT_PATH'], 'w')

    first_multiple_input = input().rstrip().split()

    n = int(first_multiple_input[0])

    d = int(first_multiple_input[1])

    arr = list(map(int, input().rstrip().split()))

    result = rotateLeft(d, arr)

    fptr.write(' '.join(map(str, result)))
    fptr.write('\n')

    fptr.close()