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Problem 1025
Just the Facts
Time Limit: 1000ms
Memory Limit: 65536kb Description
The expression N!, read as "N factorial," denotes the product of the
first N positive integers, where N is nonnegative. So, for example,
N N! 0 1 1 1 2 2 3 6 4 24 5 120 10 3628800For this problem, you are to write a program that can compute the last non-zero digit of any factorial for (0 <= N <= 10000). For example, if your program is asked to compute the last nonzero digit of 5!, your program should produce "2" because 5! = 120, and 2 is the last nonzero digit of 120. Input
Input to the program is a series of nonnegative integers not exceeding
10000, each on its own line with no other letters, digits or spaces. For
each integer N, you should read the value and compute the last nonzero
digit of N!.
Output
For each integer input, the program should print exactly one line of
output. Each line of output should contain the value N, right-justified
in columns 1 through 5 with leading blanks, not leading zeroes. Columns
6 - 9 must contain " -> " (space hyphen greater space). Column 10 must
contain the single last non-zero digit of N!.
Sample Input
1 2 26 125 3125 9999 Sample Output
1 -> 1
2 -> 2
26 -> 4
125 -> 8
3125 -> 2
9999 -> 8
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