import sys

sys.setrecursionlimit(10 ** 6)
def II(): return int(sys.stdin.readline())

def main():
    fac = [1]
    for i in range(1, 30): fac.append(fac[-1] * i)

    def nCr(n, r):
        if n < r: return 0
        return fac[n] // fac[r] // fac[n - r]

    def num(k):
        res = 0
        for c5 in range(2, k, 3):
            res += nCr(k - 1, c5)
        return res

    n = II()
    inf = 10 ** 9
    cnt = 0
    for k in range(inf):
        tmp = num(k)
        if cnt + tmp >= n: break
        cnt += tmp
    k -= 1
    for bit in range(1 << k):
        if bin(bit).count("1") % 3 == 2:
            cnt += 1
            # print(bin(bit)[2:].zfill(k))
        if cnt == n:
            ans = ""
            for i in range(k):
                ans += "5" if bit >> k - 1 - i & 1 else "3"
            ans += "5"
            print(ans)
            exit()

main()