#include<stdio.h>
#include<stdlib.h>
int main()
{
    int m,n,i,j,max,x;
    int day[100][100],city[100][100];
    while(scanf("%d%d",&n,&m)&&n&&m){
    x=0;
    int sum=0;
    for(i=0;i<n;i++)
    for(j=0;j<n;j++)scanf("%d",&city[i][j]);
    for(i=0;i<m;i++)
    for(j=0;j<n;j++)scanf("%d",&day[i][j]);
    for(i=0;i<m;i++){
        max=0;
        for(j=0;j<n;j++)
        if(max<(day[i][j]-city[x][j])){
        max=day[i][j]-city[x][j];
        x=j;}
        sum+=max;
        }
        printf("%d\n",sum);
        }
        system("pause");
        return 0;
}