프로그래머스 - 모의고사 [자바]

• 문제 링크 : 모의고사

코딩테스트 연습 - 모의고사

 

정답

import java.util.*;

class Solution {
    public int[] solution(int[] answers) {

        /*
        pickArr1 1,2,3,4,5
        pickArr2 2,1,2,3,2,4,2,5
        pickArr3 3,3,1,1,2,2,4,4,5,5
        */

        int[] pickArr1 = {1,2,3,4,5}; //5
        int[] pickArr2 = {2,1,2,3,2,4,2,5}; //8
        int[] pickArr3 = {3,3,1,1,2,2,4,4,5,5}; //10

        int[] resultArr = new int[3];                          

        //12345 % 5 4-4 5-5 0

        int index = 0;                          
        for(int answer : answers){
            if(pickArr1[index % 5] == answer){
                resultArr[0]++;
            }
            if(pickArr2[index % 8] == answer){
                resultArr[1]++;
            }
            if(pickArr3[index % 10] == answer){
                resultArr[2]++;
            }
            index++;
        }

        int max = -1;
        for(int result : resultArr){
            if(result > max){
                max = result;
            }
        }           

        List<Integer> maxList = new ArrayList<>();
        for(int i=0; i<resultArr.length; i++){
            if(max == resultArr[i]){
                   maxList.add(i+1);
            }
        }

        int[] maxPersonArr = new int[maxList.size()];
        int maxPersonCount = 0;
        for(int maxPerson : maxList){
            maxPersonArr[maxPersonCount] = maxPerson;
            maxPersonCount++;
        }

        Arrays.sort(maxPersonArr);

        return maxPersonArr;
    }
}