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