import java.util.*

fun main(args: Array<String>) {
    val calendar = Calendar.getInstance()
    val year = 2015
    var count = 0
    for (month in 1..12) {
    	calendar.set(year, month - 1, 1)
    	val maxDay = calendar.getActualMaximum(Calendar.DAY_OF_MONTH)
    	for (day in 1..maxDay) {
    		// 日の10の位
    		val a = day /10
    		// 日の1の位
    		val b = day % 10
    		if (month == a + b) {
    			count += 1
    		}
    	}
    }
    println(count)
}