def com(n, r):
    if n == 0 or r == 0: return 1
    return com(n, r - 1) * (n - r + 1) / r

def cou(b):
    return bin(b).count("1")

n = int(input())
cnt = 0
c = 2
r2 = 0
while 0 == 0:
    e = (c + 1) % 3
    r2 = 0
    while e < c:
        r = com(c,e)
        r2 += r
        cnt += r
        e+= 3
    c += 1
    if cnt >= n:
        break

n2 = int(n - (cnt - r2))

b = 2
cnt2 = 0
while cnt2 != n2:
    b += 1
    t = cou(b) 
    if  t == 2 or t == 5 or t == 8 or t == 11 or t == 14 or t == 17 or t == 20 or t == 23:
        cnt2 += 1
ans = str(bin(b)).replace("0b","").replace("1","5").replace("0","3") + "5"

while len(ans) < c:
    ans = "3" + ans

print(ans)