projecteuler Problem 20
2013-03-22 20:05
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n! means n
(n
1)
...
3
2
1
For example, 10! = 10
9
...
3
2
1 = 3628800,
and the sum of the digits in the number 10! is 3 + 6 + 2 + 8 + 8 + 0 + 0 = 27.
Find the sum of the digits in the number 100!
(n
1)
...
3
2
1
For example, 10! = 10
9
...
3
2
1 = 3628800,
and the sum of the digits in the number 10! is 3 + 6 + 2 + 8 + 8 + 0 + 0 = 27.
Find the sum of the digits in the number 100!
A = reduce(lambda a,b : a*b, range(1,101)) sum = 0 for n in str(A): sum+=int(n) print sum
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