#include<stdio.h>
int x2,x1,y1,y2,n,m,mmax,k,i,j;
int main ()
{
freopen("kdrum.in","r",stdin);
freopen("kdrum.out","w",stdout);
scanf("%d%d%d",&n,&m,&k);
scanf("%d%d%d%d",&x1,&y1,&x2,&y2);
n=1;
if(x1>x2)
n=n+x1-x2;
else
   n=n+x2-x1;
if(y1>y2)
  n=n+y1-y2;
else
   n=n+y2-y1;
   printf("%ld\n",n);
return 0;
}