K = int(eval(input()))

x = 0

for i in range (0,K,1):

    if i % 2 == 0:

        x +=1

sum = x * (K-x)

print(sum)
a=int(eval(input()))

w=int((a/2)*(a/2))

z=int(a/2)*int((a/2)+1)

if a%2==0:

    print(w)

else:

    print(z)
K = int(eval(input()))
x = 0
for i in range(0, K, 1):
    if i % 2 == 0:
        x += 1
sum = x * (K - x)
print(sum)

a = int(eval(input()))
w = int((a / 2) * (a / 2))
z = int(a / 2) * int((a / 2) + 1)
if a % 2 == 0:
    print(w)
else:
    print(z)

-K = int(eval(input())) -x = 0 -for i in range(0, K, 1): -    if i % 2 == 0: -        x += 1 -sum = x * (K - x) -print(sum) +a = int(eval(input())) +w = int((a / 2) * (a / 2)) +z = int(a / 2) * int((a / 2) + 1) +if a % 2 == 0: +    print(w) +else: +    print(z)