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S = p£¨1£© + p£¨2£© + p£¨3£© + ... + p£¨998£© + p£¨999£© ÀÇ °¡Àå Å« ¼ÒÀμö¸¦ ±¸Ç϶ó.
For positive integer n, let p£¨n£© be product of n's non-zero digits. When n is a digit positive
integer, then p£¨n£© = n.
Find the greatest prime factor of S, where S = p£¨1£© + p£¨2£© + p£¨3£© + ... + p£¨998£© + p£¨999£©.
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2009-07-09 [14:22] |
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2009-07-09 [12:34] |

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2009-07-10 |
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2009-07-10 |
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2009-07-11 |
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2009-07-11 |
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2009-07-09 [14:22] |
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2009-07-09 [12:34] |
