#include <stdio.h>
FILE *f=fopen("kdrum.in","r");
FILE *g=fopen("kdrum.out","w");
int n,m,k,xi,xj,yi,yj,a[51][51],i,j,s;
int main()
{
	fscanf(f,"%d %d %d",&n,&m,&k);
	fscanf(f,"%d %d %d %d",&xi,&xj,&yi,&yj);
	for(i=1;i<=n;i++)
		for(j=1;j<=m;j++)
			fscanf(f,"%d",&a[i][j]);
	s=(yi-xi)+(yj-xj)+1;
	fprintf(g,"%d",s);
	fclose(f);
	fclose(g);
	return 0;
}