#include <algorithm>
#include <complex>
#include <cstdlib>
#include <ctime>
#include <iomanip>
#include <iostream>
#include <map>
#include <math.h>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>

using namespace std;
#define SAY_YES cout << "YES" << endl;
#define SAY_Yes cout << "Yes" << endl;
#define SAY_NO cout << "NO" << endl;
#define SAY_No cout << "No" << endl;
#define IFYES(TRUE_OR_FALSE)   \
    if (TRUE_OR_FALSE)         \
    {                          \
        cout << "YES" << endl; \
    }                          \
    else                       \
    {                          \
        cout << "NO" << endl;  \
    }
#define IFYes(TRUE_OR_FALSE)   \
    if (TRUE_OR_FALSE)         \
    {                          \
        cout << "Yes" << endl; \
    }                          \
    else                       \
    {                          \
        cout << "No" << endl;  \
    }
#define IFyes(TRUE_OR_FALSE)   \
    if (TRUE_OR_FALSE)         \
    {                          \
        cout << "yes" << endl; \
    }                          \
    else                       \
    {                          \
        cout << "no" << endl;  \
    }
#define DEBUG_OUTPUT_ARRAY(XXX, ONE)                            \
    for (int i = 0; i < (ONE); i++)                             \
    {                                                           \
        cout << "DEBUG: i = " << i << " -> " << XXX[i] << endl; \
    }
#define DEBUG_OUTPUT_ARRAY2(XXX, ONE, TWO)                             \
    for (int i = 0; i < (ONE); i++)                                    \
    {                                                                  \
        cout << "<<< i = " << i << " >>>" << endl;                     \
        for (int j = 0; j < (TWO); j++)                                \
        {                                                              \
            cout << "DEBUG: j = " << j << " -> " << XXX[i][j] << endl; \
        }                                                              \
    }
#define DEBUG_OUTPUT_ARRAY2_BOX(XXX, ONE, TWO) \
    for (int i = 0; i < (ONE); i++)            \
    {                                          \
        cout << i << "  ";                     \
        for (int j = 0; j < (TWO); j++)        \
        {                                      \
            cout << XXX[i][j] << " ";          \
        }                                      \
        cout << endl;                          \
    }

typedef pair<long long int, long long int> pll;


const long long int mod = 1000000007;
const long long int INF = 19999999999999;

long long int N,M,P,X[200],sum=0,C[200050],x[200050],dp[20050][260]={};
int main()
{
    cout << fixed << setprecision(18);
    cin>>N>>M;
    while(N!=0){
        for(long long int i = 1; i <= M; i++){
            cin>>C[i];
        }
        for(long long int i = 1; i <= N; i++){
            cin>>x[i];
        }
        for(long long int i = 0; i <= 255; i++){
            for(long long int k = 0; k <= N; k++){
                dp[k][i]=INF;
            }
        }
        dp[0][128]=0;
        for(long long int i = 1; i <= N; i++){
            for(long long int j = 1; j <= M; j++){
                for(long long int k = 0; k <= 255; k++){
                    long long int tmp=min(max(0LL,k+C[j]),255LL);
                    dp[i][tmp]=min(dp[i][tmp],dp[i-1][k]+(tmp-x[i])*(tmp-x[i]));
                }
            }
        }
        
        long long int res=INF;
        for(long long int k = 0; k <= 255; k++){
            res=min(dp[N][k],res);
        }
        cout<<res<<endl;
        cin>>N>>M;
    }
}




Measured memory_bytes: 43800