Problème
A year divisible by 4 is a leap year unless it is also divisible by 100. Years divisible by 400 are leap years despite that exception. Apply this arithmetic rule to every allowed input year.
Implement leap_year(year).
Input
year: The year to check.
Output
Return true for a leap year and false otherwise.
Contraintes
1 ≤ year ≤ 9999.
Exemples
Entrée :
year = 2024
Sortie attendue :
expected = TrueEntrée :
long long year = 2024;
Sortie attendue :
bool expected = true;Entrée :
long year = 2024;
Sortie attendue :
bool expected = true;Explication
2024 is divisible by 4 and not by 100.
Entrée :
year = 2100
Sortie attendue :
expected = FalseEntrée :
long long year = 2100;
Sortie attendue :
bool expected = false;Entrée :
long year = 2100;
Sortie attendue :
bool expected = false;Explication
2100 is divisible by 100 but not by 400, so the century exception applies.
Comment l'aborder
Essayez d'abord seul, puis ouvrez les indices un par un.
Indice 1
Most years follow the divisible-by-4 rule, but centuries are exceptions.
Indice 2
A year divisible by 400 is still a leap year, even though it is also divisible by 100.
Indice 3
Check the exception before rejecting century years, or you may misclassify years like 2000.
Complexité attendue
O(1) time, O(1) extra space
Références
Ce défi a été adapté pour CodeUtility. Suivez l'énoncé et les contraintes ci-dessus.