#include<stdio.h>
#include<math.h>
long d1,d2,n,m,k,x,y,i,j,x2,y2,dist,a[101][101];
int main()
{
    freopen("kdrum.in","r",stdin);
    freopen("kdrum.out","w",stdout);
    scanf("%ld%ld%ld",&n,&m,&k);
    scanf("%ld%ld%ld%ld",&x,&y,&x2,&y2);
    for(i=1;i<=n;i++)
                     for(j=1;j<=m;j++)
                                      scanf("%ld",&a[i][j]);
    d1=x2-x;
    d2=y2-y;
    dist=fabs(d1)+1+fabs(d2);
    printf("%ld",dist);
    return 0;    
}