# -*- coding: utf-8 -*-

N, = map(int, raw_input().split())

fact = [1, 1]
for i in xrange(2, 30):
    fact.append(i * fact[i-1]);

def comb(n, j):
    return fact[n] / fact[n-j] / fact[j];

num = 0
ans = 0
for k in xrange(3, 25):
    add = 0
    for j in xrange(k / 3):
        add += comb(k-1, 2 + 3 * j)
    if num + add >= N:
        keta = k
        break;
    num += add
    #print k, add, num

#print k
for i in xrange((1<<k)+1, 1<<26, 2):
    #print bin(i)
    if bin(i).count("1") % 3 == 1:
        num += 1
        #print num, i
        if num == N:
            ans = i
            break
print bin(ans).replace("1", "5").replace("0", "3")[3:]

# 3桁: 2C2 -> 1
# 4桁: 3C2 -> 3
# 5桁: 4C2
# 6桁: 5C2 + 5C5
# 15桁: 14C2 + 14C5 + 14C8 + 14C11 + 14C14