long s,q;j=-1,a[12];c(int*a,int*b){return*a-*b;}main(i){for(;~scanf("%d",a+j);q+=a[j++]*!!j);qsort(a+1,j-1,4,c);i=a[j/2];q/=j-1;for(q<i?i=q:0;--j;s+=abs(a[j]-i));i=!printf("%ld",s);}