package Yukicoder

/**
 * Created by hichikawa on 2015/11/02.
 */
fun main(args: Array<String>) {
    fun readLineLongArray() : List<Long> {
        val str = readLine() as String
        val arrStr = str.split(" ")
        val ret = arrStr.map { it.toLong() }
        return ret
    }
    fun readLineLong() : Long {
        val str = readLine() as String
        return str.toLong()
    }
    fun readLineStringArray() : List<String> {
        val str = readLine() as String
        val arrStr = str.split(" ")
        return arrStr
    }
    fun isInclude35(num : Long) : Boolean {
        if (num == 0.toLong())
            return true
        else if (num % 10 == 3.toLong() || num % 10 == 5.toLong())
            return isInclude35(num / 10)
        else
            return false
    }
    var index = readLineLong()
    var num : Long = 555

    while (index > 1) {
        num += 30
        if (isInclude35(num/10)) {
            index--
        }
    }
    println(num)
}