211228

# import sys
#
# sys.setrecursionlimit(10000000)
#
# class block:
#     def __init__(self, n):
#         self.n = n
#         self.memo = [0]*10000000
#         self.viewer(n)
#
#     def viewer(self, n):
#         print(self.mainBlock(n)%100007)
#
#     def mainBlock(self, x):
#         if x == 1:
#             self.memo[x] = 1
#             return self.memo[x]
#
#         if self.memo[x]:
#             return self.memo[x]
#
#         self.memo[x] = self.mainBlock(x-3)%100007 + self.mainBlock(x-1)%100007
#         return self.memo[x]
#
# a = block(int(input()))


class block:
    def __init__(self):
        self.a = int(input())
        self.num = 1
        self.caculate()

    def caculate(self):
        if (self.a%3) != 0:
            print('0')
        else:
            for i in range(0, 99999, 3):
                if i == self.a:
                    break
                else:
                    self.num *= i

            print(self.num)



a = block()