// A month has five full weekends when it has 31 days,
// and the 1st day of the month is a Friday.
import java.time.{LocalDate, DayOfWeek}
// ------------------------------------------------------------
// Month names as a single reusable constant
// ------------------------------------------------------------
val monthNames: Array[String] = Array(
"January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December"
)
// ------------------------------------------------------------
// Function: returns true if a month has 5 full weekends
// ------------------------------------------------------------
def hasFiveFullWeekends(year: Int, month: Int): Boolean = {
val firstDay: LocalDate = LocalDate.of(year, month, 1)
val daysInMonth: Int = firstDay.lengthOfMonth()
val weekday: DayOfWeek = firstDay.getDayOfWeek()
daysInMonth == 31 && weekday == DayOfWeek.FRIDAY
}
// ------------------------------------------------------------
// Main program
// ------------------------------------------------------------
@main def main(): Unit = {
val yValue: Int = 2026
for (m <- 1 to 12) {
if (hasFiveFullWeekends(yValue, m)) {
println(s"${monthNames(m - 1)} $yValue has five full weekends.")
}
}
}
/*
run:
May 2026 has five full weekends.
*/
