The Factorial

Easy

Execution time limit is 1 second

Runtime memory usage limit is 128 megabytes

Given the value of $n!$ $(n! = 1 \cdot 2 \cdot ... \cdot (n - 1) \cdot n)$ . Find the value of $n$ .

Input

The value of $n!$ $(1 \leq n \leq 2000)$ .

Print the value of positive integer $n$ .

Input #1

Answer #1

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