import sys
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int,sys.stdin.readline().rstrip().split())
def LI(): return list(map(int,sys.stdin.readline().rstrip().split()))
def LI2(): return list(map(int,sys.stdin.readline().rstrip()))
def S(): return sys.stdin.readline().rstrip()
def LS(): return list(sys.stdin.readline().rstrip().split())
def LS2(): return list(sys.stdin.readline().rstrip())


N = I()
if N == 4:
    ans = 3
elif N == 6:
    ans = 5
elif N in [8,9,10,15,16,22]:
    ans = 7
elif N == 12:
    ans = 11
elif N == 14:
    ans = 13
elif N == 20 or N == 21:
    ans = 19
elif N == 24:
    ans = 23
else:
    ans = 8

print(ans)