305768: CF1088A. Ehab and another construction problem
Memory Limit:256 MB
Time Limit:1 S
Judge Style:Text Compare
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Description
Ehab and another construction problem
题意翻译
给一个x,找出a,b,使: ``` 1≤a,b≤x a能被b整除 a⋅b>x a/b<x ``` 如果有,输出a,b;否则输出-1题目描述
Given an integer $ x $ , find 2 integers $ a $ and $ b $ such that: - $ 1 \le a,b \le x $ - $ b $ divides $ a $ ( $ a $ is divisible by $ b $ ). - $ a \cdot b>x $ . - $ \frac{a}{b}<x $ .输入输出格式
输入格式
The only line contains the integer $ x $ $ (1 \le x \le 100) $ .
输出格式
You should output two integers $ a $ and $ b $ , satisfying the given conditions, separated by a space. If no pair of integers satisfy the conditions above, print "-1" (without quotes).
输入输出样例
输入样例 #1
10
输出样例 #1
6 3
输入样例 #2
1
输出样例 #2
-1