K=int(eval(input()))

a=[]

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

    a.append(i)



counter=0

if K>=2 and K<=100 :

    for x in range(len(a)):

        for j in range(x+1,len(a)):

            if a[x]&1==0 and a[j]&1==1 or a[x]&1==1 and a[j]&1==0:

                a[x]*a[j]%2==0

                if a[x]*a[j]%2==0:

                    counter+=1

            



    print(counter)            

x=int(eval(input()))

z=0

if x<2:

    print((0))

for i in range(2,x+1,2):

    for j in range(1,x+1,2):

        z+=1

print(z)
K = int(eval(input()))
a = []
for i in range(1, K + 1):
    a.append(i)
counter = 0
if K >= 2 and K <= 100:
    for x in range(len(a)):
        for j in range(x + 1, len(a)):
            if a[x] & 1 == 0 and a[j] & 1 == 1 or a[x] & 1 == 1 and a[j] & 1 == 0:
                a[x] * a[j] % 2 == 0
                if a[x] * a[j] % 2 == 0:
                    counter += 1
    print(counter)

x = int(eval(input()))
z = 0
if x < 2:
    print((0))
for i in range(2, x + 1, 2):
    for j in range(1, x + 1, 2):
        z += 1
print(z)

-K = int(eval(input())) -a = [] -for i in range(1, K + 1): -    a.append(i) -counter = 0 -if K >= 2 and K <= 100: -    for x in range(len(a)): -        for j in range(x + 1, len(a)): -            if a[x] & 1 == 0 and a[j] & 1 == 1 or a[x] & 1 == 1 and a[j] & 1 == 0: -                a[x] * a[j] % 2 == 0 -                if a[x] * a[j] % 2 == 0: -                    counter += 1 -    print(counter) +x = int(eval(input())) +z = 0 +if x < 2: +    print((0)) +for i in range(2, x + 1, 2): +    for j in range(1, x + 1, 2): +        z += 1 +print(z)