1011 最大公约数GCD

import java.util.Scanner;
public class Main {
    static int gcd(int a,int b){
        return a%b==0? b:gcd(b,a%b);
    }

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner sc=new Scanner(System.in);
        while(sc.hasNext()){
            int a=sc.nextInt();
            int b=sc.nextInt();
            System.out.println(gcd(a,b));
        }
        sc.close();

    }

}