Week5 #13
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Week5 #13
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Collaborator
arinming
commented
Oct 5, 2024
arinming
commented
chattymin
approved these changes
Oct 6, 2024
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| fun solution(a: Int, b: Int): String { | ||
| val daysOfMonth = listOf(0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31) | ||
| val dayOfWeek = listOf("FRI", "SAT", "SUN", "MON", "TUE", "WED", "THU") | ||
| val totalDays = (1 until a).sumOf { daysOfMonth[it] } + b - 1 | ||
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| return dayOfWeek[totalDays % 7] | ||
| } |
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사실 제 코드 처음에 너무 복잡하길래 블로그에서 이거저것........눈팅했읍니다
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| fun checkPrime(num: Long): Boolean { | ||
| if (num < 2) return false | ||
| for (i in 2..Math.sqrt(num.toDouble()).toLong()) { | ||
| if (num % i == 0L) return false | ||
| } | ||
| return true | ||
| } |
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저도 이번에 구현하면서 깨달은건데 짝수는 2로 나눠지니 2로 나눠보고, 그 후부터는 3으로 시작해서 2씩 늘리면 시간이 완전 단축되더라구요!
물론 에라토스테네스의 체 같은 알고리즘을 쓰면 좋지만 그걸 전 외우진 못해서... ㅎㅎ...
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오오오오옹..........!!!!!!!!!!!!!! 그런 부분까지,,. 진짜 코테는 너머 어려워요 ㅠㅠ
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