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Copy pathLargest Product in Series
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Largest Product in Series
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import time
time.perf_counter()
lst = list('7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843\
8586156078911294949545950173795833195285320880551112540698747158523863050715693290963295227443043557\
6689664895044524452316173185640309871112172238311362229893423380308135336276614282806444486645238749\
3035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776\
6572733300105336788122023542180975125454059475224352584907711670556013604839586446706324415722155397\
5369781797784617406495514929086256932197846862248283972241375657056057490261407972968652414535100474\
8216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586\
1786645835912456652947654568284891288314260769004224219022671055626321111109370544217506941658960408\
0719840385096245544436298123098787992724428490918884580156166097919133875499200524063689912560717606\
0588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450')
def largestprod(n, lst):
left = 0
right = n
max = 1
while right <= len(lst):
prod = 1
if lst[right - 1] == 0:
left += n
right += n
continue
for i in range(left, right):
prod *= int(lst[i])
if prod > max:
max = prod
#print(max)
#print(lst[left], lst[left+1], lst[left+2], lst[left+3])
left += 1
right += 1
return max
print(largestprod(13, lst))
print("\n", time.perf_counter(), "seconds")