#include<stdio.h>
int main()
{
    int a,b,c,min,i;
    scanf("%d %d %d",&a,&b,&c);
    if(a<=b&&a<=c){
        min=a;
    }else if(b<=a&&b<=c){
        min=b;
    }else{
        min=c;
    }
    for(i=min;i>=1;i--){
        if(a%i==0&&b%i==0&&c%i==0){
            printf("%d",i);
            break;
        }
    }
   return 0;
}//将就看看吧