def sieve_of_eratosthenes(n):
    pl = [i for i in range(2, n + 1)]
    i=0
    p = pl[0]
    while p**2<=n:
        pl = [pl[j] for j in range(len(pl)) if pl[j]%p!=0 or j<=i]
        i+=1
        p=pl[i]
    return pl

pl = sieve_of_eratosthenes(200000)

pl2 = []
for p in pl:
    if p>100000:
        pl2.append(p)

pl3 = pl2[:10]

pl4 = [1]

for p1 in pl3:
    for p2 in pl3:
        pl4.append(p1*p2)

pl4 = list(set(pl4))

pl4.sort()

N = int(input())

print(pl4[N-1])