#include <stdio.h>
#include <stdlib.h>

int main()
{int a,b,c,max,middle,min,s;
scanf("%d%d%d",&a,&b,&c);
if(a>b){max=a;min=b;}
else {max=b;min=a;}
if(c<max){
if(max==a)
{if(c>b){middle=c;min=b;}
else {middle=b;min=c;}
}
if(max==b)
{if(c>a){middle=c;min=a;}
else {middle=a;min=c;}
}
  }
  if(c>max)
  {
        max=c;
  if(a>b){middle=a;min=b;}
  else {middle=b;min=a;}
  }
  printf("%d\n",s=min+middle-max);
    return 0;
}