// 精簡版
public class JPA03 {
public static void main(String[] args) {
java.util.Scanner s = new java.util.Scanner(System.in);
int a,b,i;
while(true){
System.out.println("Input:");
if((i = (a = s.nextInt()))==999) break;
b = s.nextInt();
while(!(a%i==0&&b%i==0)) i--;
System.out.println(i);
}
}
}
//-------------------------------------------------
import java.util.*;
public class JPA03 {
public static void main(String[] args) {
Scanner s = new Scanner(System.in);
int a,b,i;
while(true){
System.out.println("Input:");
a = s.nextInt();
if(a==999){
break;
}
b = s.nextInt();
i=a;
while (true){
if (a%i==0&&b%i==0){
break;
}
else{
i=i-1;
}
}
System.out.println(i);
}
}
}
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