Problema
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.
Restrições
1 ≤ year ≤ 9999.
Exemplos
Entrada:
year = 2024
Saída esperada:
expected = TrueEntrada:
long long year = 2024;
Saída esperada:
bool expected = true;Entrada:
long year = 2024;
Saída esperada:
bool expected = true;Explicação
2024 is divisible by 4 and not by 100.
Entrada:
year = 2100
Saída esperada:
expected = FalseEntrada:
long long year = 2100;
Saída esperada:
bool expected = false;Entrada:
long year = 2100;
Saída esperada:
bool expected = false;Explicação
2100 is divisible by 100 but not by 400, so the century exception applies.
Como abordar
Tente sozinho primeiro e depois abra uma dica de cada vez.
Dica 1
Most years follow the divisible-by-4 rule, but centuries are exceptions.
Dica 2
A year divisible by 400 is still a leap year, even though it is also divisible by 100.
Dica 3
Check the exception before rejecting century years, or you may misclassify years like 2000.
Complexidade esperada
O(1) time, O(1) extra space
Referências
Este desafio foi adaptado para o CodeUtility. Siga o enunciado e as restrições acima.