def main():
"""Main program."""
answer = 10**10
start_time = time.time()
index_n = 1
while True:
index_n += 1
p_number_1 = fn.get_pentagonal_number(index_n)
for index_b in range(index_n - 1, 0, -1):
p_number_2 = fn.get_pentagonal_number(index_b)
diff_p = abs(p_number_1 - p_number_2)
if fn.is_pentagonal(diff_p):
sum_p = p_number_1 + p_number_2
if fn.is_pentagonal(sum_p):
answer = min(answer, diff_p)
break
if answer < 10**10:
break
end_time = time.time()
print("The answer is %d" % answer)
print("%f seconds elapsed." % (end_time - start_time))
import pyperclip
pyperclip.copy(str(answer))
print("The answer has been placed in the clipboard.")
def test_is_pentagonal(self):
"""Test is_pentagonal()"""
p_numbers = [1, 5, 12, 22, 35, 51, 70, 92, 117, 145]
for number in p_numbers:
self.assertTrue(fn.is_pentagonal(number),
"%d should be pentagonal" % number)
not_p_numbers = [2, 3, 4, 6, 7, 27, 37, 55, 77, 96, 120, 150]
for number in not_p_numbers:
self.assertFalse(fn.is_pentagonal(number),
"%d should not be pentagonal" % number)
def main():
"""Main program."""
answer = 0
start_time = time.time()
index = 285
while True:
index = index + 1
t_number = fn.get_triangular_number(index)
if fn.is_pentagonal(t_number) and fn.is_hexagonal(t_number):
answer = t_number
break
end_time = time.time()
print("The answer is %d" % answer)
print("%f seconds elapsed." % (end_time - start_time))
import pyperclip
pyperclip.copy(str(answer))
print("The answer has been placed in the clipboard.")
