val scanner = new java.util.Scanner(System.in)
val line = scanner.nextLine

val lst: Array[Int] = line.split(" ").map{_.toInt}
//一応配列の要素数を取得
val listNum: Int = lst.length

// わかりやすさのためにいったんすべて変数に代入する
val wakeUpH: Int = lst(0)
val wakeUpM: Int = lst(1)
val sleepH: Int = lst(2)
val sleepM: Int = lst(3)
val studyM: Int = lst(4)

val diffH: Int = sleepH - wakeUpH
val diffM: Int = sleepM - wakeUpM
//勉強できる時間
val canStudyTime: Int = diffH*60 + diffM - studyM

println(canStudyTime)