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uDebugBig Factorials
Limits: 1s, 512 MB
Given an integer N, print the trailing 4 digits of $ N! $ (N factorial).
$ N! = N \times (N-1) \times (N-2) \times ... \times 1 $
Here are some examples of $ N! $ and their last 4 digits.
| N | $ N! $ | Last 4 Digits |
|---|---|---|
| 3 | 6 | 6 |
| 7 | 5040 | 5040 |
| 11 | 39916800 | 6800 |
| 15 | 1307674368000 | 8000 |
Input
The input will contain an integer N (0 < N < 1000).
Output
Print the last 4 digits of $ N! $.
Do not print any leading zeroes.
Samples
| Input | Output |
|---|---|
4 | 24 |
10 | 8800 |
Discussion
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