import java.util.Scanner

//
fun _Do() {

    val Y = scan.nextInt()// 1-
    
    println(2017-Y)
}

var scan = Scanner(System.`in`)
fun main( argv : Array<String> ) {
    _Do()
}

fun strings(N:Int):Array<String> = Array(N,{scan.next()})
fun ints(N:Int):Array<Int> = Array(N,{scan.nextInt()})
fun longs(N:Int):Array<Long> = Array(N,{scan.nextLong()})