import java.lang.StringBuilder

fun main(args:Array<String>) {
    var n = readLine()!!.toInt()
    val ans = StringBuilder()
    if(n % 2 == 1) {
        ans.append(7)
        n -= 3
    } else {
        ans.append(1)
        n -= 2
    }

    for(i in (0 until  (n/2))) {
        ans.append(1)
    }
    println(ans.toString())

}