def solve():
pandigital = set()
for i in range(10000):
for n in range(1, 10):
product = ''.join(str(i * j) for j in range(1, n+1))
if isPandigital(product):
pandigital.add(product)
return max(pandigital)
def solve():
# use a set to ignore the same number
pandigital = set()
for i in range(2,100):
s = 123
for j in range(s, 10000/i+1):
num = str(i) + str(j) + str(i*j)
if isPandigital(num):
pandigital.add(i*j)
return sum(pandigital)