n = int(input())
s = 0
t = 0
for i in range(1, n + 1):
    if i % 2 == 0:
        s += i
    if i % 2 == 1:
        t += i
print(str(t)+' '+str(s))

/**************************************************************
	Problem: 1091
	User: admin
	Language: Python
	Result: Accepted
	Time:44 ms
	Memory:34480 kb
****************************************************************/