10389: 基础函数使用 —— __gcd
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Description
Syntax for C++14 :
Library: 'algorithm' __gcd(m, n) Parameter :m, n Return Value :0 if both m and n are zero, else gcd of m and n.
Syntax for C++17 :
Library:'numeric' gcd(m, n) Parameter :m, n Return Value :0 if both m and n are zero, else gcd of m and n.
Input
一行两个整数 $n,m\ (-10^9 \leq n,m \leq 10^9)$。
Output
一行一个整数，表示答案。
Sample 1 Input
6 20
Sample 1 Output
2
Sample 2 Input
0 15
Sample 2 Output
15
Sample 3 Input
0 0
Sample 3 Output
0
-8 800
-8