import java.util.Scanner

//
fun _Do() {
    
    val N = scan.next()
    
    if(N=="0")
        println(0)
    else
        println(N+"0")

}

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()})