// clang-format off
#include<bits/stdc++.h>
#define pb push_back
#define P make_pair
#define fi first
#define se second
#define bit(s,x) (((s)>>(x))&1)
#define pnp(s) __builtin_popcountll(s)
#define rep(i,a,b) for(int i=(a);i<=(b);++i)
#define per(i,a,b) for(int i=(a);i>=(b);--i)
using namespace std;
mt19937 gen(time(0));
typedef long long ll; 
typedef unsigned long long ull; 
typedef pair<int,int> pii; typedef pair<ll,int> pli; typedef pair<ll,ll> pll; typedef pair<int,ll> pil;
inline ll read(){
	ll x=0,f=1,c=getchar();
	while(c<'0'||c>'9')f=(c=='-'?-1:1),c=getchar();
	while(c>='0'&&c<='9')x=(x<<1)+(x<<3)+(c^48),c=getchar();
	return x*f;
}
const int mod=998244353;
inline int fp(int x,ll p=mod-2,int m=mod,int res=1){
	for(;p;p>>=1){if(p&1)res=1ll*res*x%m;x=1ll*x*x%m;}
	return res;
}
const int N=5e5+3;
const int K=10;
priority_queue<pii,vector<pii>,greater<pii>>q[K*K];
// clang-format on
int n,m,c[N][K],a[K];
ll ans,f[K][K],mp[K][K];
int vis[N],g[K][K];
inline void update(int x,int y){
	vis[x]=y;
	rep(k,0,m-1)if(y!=k) q[y*m+k].push(P(c[x][k]-c[x][y],x));
}
vector<int>vec;
inline void get(int x,int y){
	//printf("get(%d %d %d)\n",x,y,g[x][y]);
	if(!~g[x][y]){vec.pb(x);return ;}
	get(x,g[x][y]),get(g[x][y],y);
}
int main() {
    //freopen("data.in", "r", stdin);
    // freopen(".in","r",stdin);
    // freopen("myans.out","w",stdout);
	n=read(),m=read();
	memset(c,0x7f,sizeof c);
	rep(i,1,n)rep(j,0,m-1)c[i][j]=read();
	int tot=0;
	rep(j,0,m-1){
		a[j]=read();
		rep(k,1,a[j]){
			++tot;
			if(tot<=n)ans += c[tot][j];
			update(tot,j);
		}
	}
	while(1){
		rep(i,0,m-1)rep(j,0,m-1){
			int p=i*m+j;
			while(!q[p].empty() && vis[q[p].top().se] != i)q[p].pop();
			mp[i][j]=f[i][j]=q[p].empty()?1e14:q[p].top().fi;
			g[i][j]=-1;
		}
		rep(k,0,m-1){
			rep(i,0,k)rep(j,0,k)if(k!=i && k!=j && f[i][k]+f[k][j]<f[i][j])f[i][j]=f[i][k]+f[k][j],g[i][j]=k;
		}
		ll mn=1e15;int qa;
		rep(i,0,m-1)if(f[i][i]<mn)qa=i,mn=f[i][i];
		if(mn>=0)break;
		vec.clear();get(qa,qa);vec.pb(qa);
		ll old=ans;
		rep(i,0,vec.size()-2){
			int x=vec[i],y=vec[i+1],p=x*m+y;
			ans += q[p].top().fi;
			update(q[p].top().se,y);
			//q[p].pop();
		}
		//assert(ans-old==mn);
		//printf("mn=%lld\n",mn);
	}
	cout<<ans;
    return 0;
}