#include<stdio.h>

#include<math.h>

int main()

{

????int x,y,z,a,b,c,max,t;

????scanf("%d %d %d",&x,&y,&z);

????a=fabs(x);

????b=fabs(y);

????c=fabs(z);

????max=c;t=z;

????if(b>=c)

????{

????????max=b;

????????t=y;

????}??

????if(a>=b)

????{

????????max=a;

????????t=x;

????}

????printf("%d",t);

????return 0;

}