Buggy python submission (verdict: Time Limit Exceeded):
import itertools

N, K = map(int, input().split())

comb = []
if K % 2 != 0:
    tail = N//K+1
    for a in range(1, tail):
        for b in range(1, tail):
            for c in range(1, tail):
                # print('odd:', a*K, b*K, c*K)
                comb.append((a, b, c))
else:
    tail = N//K+1
    for a in range(1, tail):
        for b in range(1, tail):
            for c in range(1, tail):
                # print('even_1:', a*K, b*K, c*K)
                comb.append((a, K, b, K, c, K))
    tail = (2*N+K)//(2*K)+1
    for a in range(1, tail):
        for b in range(1, tail):
            for c in range(1, tail):
                # print('even_2:', a*K-K//2, b*K-K//2, c*K-K//2)
                comb.append((a, K, 1, b, K, 1, c, K, 1))


print(len(set(comb)))


Fixed submission:
N, K = map(int, input().split())

if K % 2 == 0:
    ans = (N//K)**3 + ((N+K//2)//K)**3
else:
    ans = (N//K)**3
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import itertools

N, K = map(int, input().split())

comb = []
if K % 2 != 0:
    for a, b, c in itertools.product(range(1, N//K+1), range(1, N//K+1), range(1, N//K+1)):
        # print('odd:', a*K, b*K, c*K)
        comb.append((a, b, c))
else:
    for a, b, c in itertools.product(range(1, N//K+1), range(1, N//K+1), range(1, N//K+1)):
        # print('even_1:', a*K, b*K, c*K)
        comb.append((a, K, b, K, c, K))
    for a, b, c in itertools.product(range(1, (2*N+K)//(2*K)+1), range(1, (2*N+K)//(2*K)+1), range(1, (2*N+K)//(2*K)+1)):
        # print('even_2:', a*K-K//2, b*K-K//2, c*K-K//2)
        comb.append((a, K, 1, b, K, 1, c, K, 1))


print(len(set(comb)))


Fixed submission:
N, K = map(int, input().split())

if K % 2 == 0:
    ans = (N//K)**3 + ((N+K//2)//K)**3
else:
    ans = (N//K)**3
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import itertools

N, K = map(int, input().split())

comb = []
if K % 2 != 0:
    for a, b, c in itertools.product(range(1, N//K+1), range(1, N//K+1), range(1, N//K+1)):
        comb.append((a, b, c))
else:
    for a, b, c in itertools.product(range(1, N//K+1), range(1, N//K+1), range(1, N//K+1)):
        comb.append(((a, K), (b, K), (c, K)))
    for a, b, c in itertools.product(range(1, (2*N+K)//(2*K)+1), range(1, (2*N+K)//(2*K)+1), range(1, (2*N+K)//(2*K)+1)):
        comb.append(((a, K, 1), (b, K, 1), (c, K, 1)))


print(len(set(comb)))


Fixed submission:
N, K = map(int, input().split())

if K % 2 == 0:
    ans = (N//K)**3 + ((N+K//2)//K)**3
else:
    ans = (N//K)**3
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import itertools

N, K = map(int, input().split())

comb = []
if K % 2 != 0:
    for a, b, c in itertools.product(range(1, N//K+1), range(1, N//K+1), range(1, N//K+1)):
        comb.append((a, b, c))
else:
    for a, b, c in itertools.product(range(1, N//K+1), range(1, N//K+1), range(1, N//K+1)):
        comb.append((a*K, b*K, c*K))
    for a, b, c in itertools.product(range(1, (2*N+K)//(2*K)+1), range(1, (2*N+K)//(2*K)+1), range(1, (2*N+K)//(2*K)+1)):
        comb.append((a*K-K//2, b*K-K//2, c*K-K//2))


print(len(set(comb)))


Fixed submission:
N, K = map(int, input().split())

if K % 2 == 0:
    ans = (N//K)**3 + ((N+K//2)//K)**3
else:
    ans = (N//K)**3
print(ans)