let inpt = Int(readLine()!)!

var cur = inpt

var ans = ""
if(cur == 0) {
    ans = "0"
}
while cur > 0 {
    if(cur >= 7) {
        let tmp = cur % 7
        ans = String(tmp) + ans
        cur -= tmp
        cur /= 7
    } else {
        ans = String(cur) + ans
        break
    }
}
print(ans)