#include<bits/stdc++.h>
using namespace std;
#define r(i,n) for(int i=0;i<n;i++)
#define INF 100000000
int dp[20001][256];
 int main(){
  int n,m;
  while(cin>>n>>m,n){
    int b[m];int a[n+1];
    r(i,m)cin>>b[i];
    r(i,n)cin>>a[i+1];
    r(i,n+1)r(j,256)dp[i][j]=INF;
    dp[0][128]=1;
    r(i,n)r(j,256)
        if(dp[i][j]!=INF)r(k,m){
          int p=j+b[k];
          if(p>255)p=255;
          if(p<0)p=0;
          dp[i+1][p]=min(dp[i+1][p],dp[i][j]+(a[i+1]-p)*(a[i+1]-p));
        }
    int p=100000000;
    r(i,256)if(dp[n][i]!=INF)
      p=min(p,dp[n][i]);
    cout<<p-1<<endl;
  }
}