[COS PRO 1급 기출문제 - Java] 1-7 병합 and 정렬

edu.goorm.io/learn/lecture/17301/cos-pro-1%EA%B8%89-%EA%B8%B0%EC%B6%9C%EB%AC%B8%EC%A0%9C-java/lesson/839401/1%EC%B0%A8-%EB%AC%B8%EC%A0%9C7-%EB%B3%91%ED%95%A9-and-%EC%A0%95%EB%A0%AC-java

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문제 유형

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문제

 

import java.util.*;
 
class Main{
    public int[] solution(int[] arrA, int[] arrB) {
        int arrA_idx = 0, arrB_idx = 0;
        int arrA_len = arrA.length;
        int arrB_len = arrB.length;
        int answer[] = new int[arrA_len + arrB_len];
        int answer_idx = 0;
        while(________){
            if(arrA[arrA_idx] < arrB[arrB_idx])
                answer[answer_idx++] = arrA[arrA_idx++];
            else
                answer[answer_idx++] = arrB[arrB_idx++];
        }
        while(________)
            answer[answer_idx++] = arrA[arrA_idx++];
        while(________)
            answer[answer_idx++] = arrB[arrB_idx++];
        return answer;
    }
 
public static void main(String[] args) {
        Main sol = new Main();
        int[] arrA = {-2, 3, 5, 9};
        int[] arrB = {0, 1, 5};
        int[] ret = sol.solution(arrA, arrB);
 
        System.out.println("solution 함수의 반환 값은 " + Arrays.toString(ret) + " 입니다.");
    }
}
 

 

풀이

import java.util.*;
 
class Main{
    public int[] solution(int[] arrA, int[] arrB) {
        int arrA_idx = 0, arrB_idx = 0;
        int arrA_len = arrA.length;
        int arrB_len = arrB.length;
        int answer[] = new int[arrA_len + arrB_len];
        int answer_idx = 0;
        while(arrA_idx < arrA_len && arrB_idx < arrB_len){
            if(arrA[arrA_idx] < arrB[arrB_idx])
                answer[answer_idx++] = arrA[arrA_idx++];
            else
                answer[answer_idx++] = arrB[arrB_idx++];
        }
        while(arrA_idx < arrA_len)
            answer[answer_idx++] = arrA[arrA_idx++];
        while(arrB_idx < arrB_len)
            answer[answer_idx++] = arrB[arrB_idx++];
        return answer;
    }
 
public static void main(String[] args) {
        Main sol = new Main();
        int[] arrA = {-2, 3, 5, 9};
        int[] arrB = {0, 1, 5};
        int[] ret = sol.solution(arrA, arrB);
 
        System.out.println("solution 함수의 반환 값은 " + Arrays.toString(ret) + " 입니다.");
    }
}