[프로그래머스/Lv.1] 개인정보 수집 유효기간 (Java)

개인정보 수집 유효기간

https://school.programmers.co.kr/learn/courses/30/lessons/150370

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풀이

한 달 = 28일 

-> 모든 날짜를 일(day)로 변환해서 계산

static int convert(String date) {
    String[] d = date.split("\\.");
    int y = Integer.parseInt(d[0]);
    int m = Integer.parseInt(d[1]);
    int day = Integer.parseInt(d[2]);
    return y * 12 * 28 + m * 28 + day;
}

 

`terms`를 `HashMap`에 저장

Map<String, Integer> HM = new HashMap<>();
for (String t : terms) {
    String[] parts = t.split(" ");
    HM.put(parts[0], Integer.parseInt(parts[1]));
}

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코드

import java.util.*;

class Solution {
    static int convert(String date) {
        String[] d = date.split("\\.");
        int y = Integer.parseInt(d[0]);
        int m = Integer.parseInt(d[1]);
        int day = Integer.parseInt(d[2]);
        return y * 12 * 28 + m * 28 + day;
    }
    
    public int[] solution(String today, String[] terms, String[] privacies) {
        Map<String, Integer> HM = new HashMap<>();
        for (String t : terms) {
            String[] parts = t.split(" ");
            HM.put(parts[0], Integer.parseInt(parts[1]));
        }
        
        int todayDay = convert(today);
        List<Integer> arr = new ArrayList<>();
        for (int i = 0; i < privacies.length; i++) {
            String[] parts = privacies[i].split(" ");
            int startDay = convert(parts[0]);
            int expireDay = startDay + HM.get(parts[1]) * 28;

            if (expireDay <= todayDay) {
                arr.add(i + 1);
            }
        }
        
        return arr.stream().mapToInt(i -> i).toArray();
    }
}