#include?<math.h>
int?main()
{
int?a,?b,?c,?min;
scanf("%d%d%d",?&a,&b,&c);
min?=?a;
if(fabs(min)>fabs(b))
min?=?b;
if(fabs(min)>fabs(c))
min?=?c;
printf("%d\n",?min);
return?0;
}