1386: 500!
| Result | TIME Limit | MEMORY Limit | Run Times | AC Times | JUDGE |
|---|---|---|---|---|---|
 |
3s | 8192K | 2898 | 518 | Standard |
In these days you can more and more often happen to see programs which perform some useful calculations being executed rather then trivial screen savers. Some of them check the system message queue and in case of finding it empty (for examples somebody is editing a file and stays idle for some time) execute its own algorithm.
As an examples we can give programs which calculate primary numbers.
One can also imagine a program which calculates a factorial of given numbers. In this case it is the time complexity of order O(n) which makes troubles, but the memory requirements. Considering the fact that 500! gives 1135-digit number no standard, neither integer nor floating, data type is applicable here.
Your task is to write a programs which calculates a factorial of a given number.
Assumptions: Value of a number "n" which factorial should be calculated of does not exceed 500.
Input
Any number of lines, each containing value "n" for which you should provide value of n!
Output
2 lines for each input case. First should contain value "n" followed by character `!'. The second should contain calculated value n!. Mind that visually big numbers will be automatically broken after 80 characters.
Sample Input
10 30 50 100
Sample Output
10! 3628800 30! 265252859812191058636308480000000 50! 30414093201713378043612608166064768844377641568960512000000000000 100! 93326215443944152681699238856266700490715968264381621468592963895217599993229915 608941463976156518286253697920827223758251185210916864000000000000000000000000
}