Chilly Willy

题意翻译

willy对于数学十分感兴趣，他想知道在n位数中最小且可以被2，3，5，7整除的数，如果可以，请输出这个数，如果不行则输出-1。

题目描述

Chilly Willy loves playing with numbers. He only knows prime numbers that are digits yet. These numbers are $ 2 $ , $ 3 $ , $ 5 $ and $ 7 $ . But Willy grew rather bored of such numbers, so he came up with a few games that were connected with them. Chilly Willy wants to find the minimum number of length $ n $ , such that it is simultaneously divisible by all numbers Willy already knows ( $ 2 $ , $ 3 $ , $ 5 $ and $ 7 $ ). Help him with that. A number's length is the number of digits in its decimal representation without leading zeros.

输入输出格式

输入格式

A single input line contains a single integer $ n $ ( $ 1<=n<=10^{5} $ ).

输出格式

Print a single integer — the answer to the problem without leading zeroes, or "-1" (without the quotes), if the number that meet the problem condition does not exist.

输入输出样例

输入样例 #1

1

输出样例 #1

-1

输入样例 #2

5

输出样例 #2

10080