문제
Return the number of days in month of year in the Gregorian calendar. February has 29 days in a leap year: years divisible by 4, except those divisible by 100 unless also divisible by 400. A helper function is_leap(year) keeps the code tidy.
Implement days_in_month(year, month).
Input
year: The year. month: The month, 1 (January) to 12 (December).
Output
Return the number of days.
제약 조건
1 ≤ year ≤ 9,999; 1 ≤ month ≤ 12
예시
예시 1
입력:
year = 2024
month = 2
예상 출력:
expected = 29입력:
long long year = 2024;
long long month = 2;
예상 출력:
long long expected = 29;입력:
long year = 2024;
long month = 2;
예상 출력:
long expected = 29;설명
2024 is divisible by 4 and not by 100, so it is a leap year: 29 days.
예시 2
입력:
year = 1900
month = 2
예상 출력:
expected = 28입력:
long long year = 1900;
long long month = 2;
예상 출력:
long long expected = 28;입력:
long year = 1900;
long month = 2;
예상 출력:
long expected = 28;설명
1900 is divisible by 100 but not 400, so it is not a leap year: 28 days.
참고 자료
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