Go: package main

import (
	"bufio"
	_ "container/heap"
	"fmt"
	"os"
	_ "sort"
	"strconv"
)

// I/O
type Scanner struct {
	sc *bufio.Scanner
}

func NewScanner() *Scanner {
	sc := bufio.NewScanner(os.Stdin)
	sc.Split(bufio.ScanWords)
	sc.Buffer(make([]byte, 1024), int(1e+9))
	return &Scanner{sc}
}

func (s *Scanner) nextStr() string {
	s.sc.Scan()
	return s.sc.Text()
}

func (s *Scanner) nextInt() int {
	i, e := strconv.Atoi(s.nextStr())
	if e != nil {
		panic(e)
	}
	return i
}

func (s *Scanner) nextFloat() float64 {
	f, e := strconv.ParseFloat(s.nextStr(), 64)
	if e != nil {
		panic(e)
	}
	return f
}

func (s *Scanner) nextRuneSlice() []rune {
	return []rune(s.nextStr())
}

func (s *Scanner) nextIntSlice(n int) []int {
	res := make([]int, n)
	for i := 0; i < n; i++ {
		res[i] = s.nextInt()
	}
	return res
}

func (s *Scanner) nextFloatSlice(n int) []float64 {
	res := make([]float64, n)
	for i := 0; i < n; i++ {
		res[i] = s.nextFloat()
	}
	return res
}

// Arithmetic
func max(nums ...int) int {
	m := nums[0]
	for _, i := range nums {
		if m < i {
			m = i
		}
	}
	return m
}

func min(nums ...int) int {
	m := nums[0]
	for _, i := range nums {
		if m > i {
			m = i
		}
	}
	return m
}

func abs(x int) int {
	if x > 0 {
		return x
	}
	return -x
}

func pow(x, y int) int {
	res := 1
	for i := 0; i < y; i++ {
		res *= x
	}
	return res
}

func ceil(a, b int) int {
	if a%b == 0 {
		return a / b
	} else {
		return a/b + 1
	}
}

func gcd(a, b int) int {
	if b == 0 {
		return a
	}
	return gcd(b, a%b)
}

func lcm(a, b int) int {
	return a / gcd(a, b) * b
}

// Sort
type RuneSlice []rune

func (a RuneSlice) Len() int           { return len(a) }
func (a RuneSlice) Less(i, j int) bool { return a[i] < a[j] }
func (a RuneSlice) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }

// Main
const MOD = int(1e+9) + 7
const INF = 1 << 60

func main() {
	sc := NewScanner()
	wtr := bufio.NewWriter(os.Stdout)
	defer wtr.Flush()
	for true {
		N, M := sc.nextInt(), sc.nextInt()
		if N == 0 && M == 0 {
			break
		}
		C := sc.nextIntSlice(M)
		X := sc.nextIntSlice(N)
		dp := make([][256]int, N+1)
		for i := 0; i < N+1; i++ {
			for j := 0; j < 256; j++ {
				dp[i][j] = INF
			}
		}
		dp[0][128] = 0
		for i := 0; i < N; i++ {
			for j := 0; j < 256; j++ {
				if dp[i][j] == INF {
					continue
				}
				for k := 0; k < M; k++ {
					nex := j + C[k]
					if nex < 0 {
						nex = 0
					}
					if nex > 255 {
						nex = 255
					}
					dp[i+1][nex] = min(dp[i+1][nex], dp[i][j]+pow(X[i]-nex, 2))
				}
			}
		}
		ans := INF
		for i := 0; i < 256; i++ {
			ans = min(ans, dp[N][i])
		}
		fmt.Fprintln(wtr, ans)
	}
}

C++: #include <iostream>
#include <queue>
#include <map>
#include <cmath>
#include <algorithm>
#include <queue>
#include <cstdarg>
#include <set>
#include <limits>
#include <iomanip>

using namespace std;
#define INF 2e9 + 9
#define MOD 1000000007
#define ALL(v) v.begin() , v.end()
#define Int int64_t
#define pll pair<Int,Int>
template<class T> using pql = priority_queue<T, vector<T>>;
template<class T> using pq = priority_queue<T, vector<T>, greater<T>>;
#define ll(n) Int n; cin >> n;
#define LL(...) Int __VA_ARGS___; cin >> __VA_ARGS___;
#define OUT(...) cout << __VA_ARGS___;
#define RP(n, i, s) for(Int i = s ;i < n ;i++)
#define REP(n, i) for (Int i = 0; i < n; i++)
#define REPe(n, i) for (Int i = 1; i <= n; i++)
#define RPe(n, i, s) for (Int i = s; i <= n; i++)
#define upd_max(maxer, updater) if (maxer < updater) maxer = updater;

void ansYes(bool flag) {
    if (flag) cout << "Yes" << endl; else cout << "No" << endl;
}

void ansYES(bool flag) {
    if (flag) cout << "YES" << endl; else cout << "NO" << endl;
}

struct node {
    Int to;
    Int length;
};


vector<Int> divisor(Int n) {
    vector<Int> ret;
    for (Int i = 1; i * i <= n; i++) {
        if (n % i == 0) {
            ret.push_back(i);
            if (i * i != n) ret.push_back(n / i);
        }
    }
    return (ret);
}

/*
vector<vector<int>> to;
vector<int> flag;
vector<int> c;


Int dfs(int from, int mae) {
    flag[from] = 1;
    Int mini = 0;
    for (auto next : to[from]) {
        if (next == mae) continue;
        if (flag[next] == 1) {
            return -1;
        } else {
            mini = min(mini, dfs(next, from));
        }
    }
    return mini;
}*/

int dx8[8] = {0, -1, -1, -1, 0, 1, 1, 1};
int dy8[8] = {-1, -1, 0, 1, 1, 1, 0, -1};

int dx[4] = {0, -1, 0, 1};
int dy[4] = {-1, 0, 1, 0};

struct datas {
    Int max;
    Int size;
};

class ContainChecker {
protected:
    Int minx, miny, maxx, maxy;
public:
    ContainChecker(Int minx, Int miny, Int maxx, Int maxy) : minx(minx), miny(miny), maxx(maxx), maxy(maxy) {};

    bool in(Int x, Int y) {
        return (minx <= x && miny <= y && x <= maxx && y <= maxy);
    }
};


int main(void) {
    while(1) {
        Int n, m;
        cin >> n >> m;
        if (n == 0) break;
        vector<Int> code(m);
        vector<Int> in(n);
        vector<vector<Int>> dp(20001,vector<Int>(520,1e15));
        REP(m, i) {
            cin >> code.at(i);
        }

        REP(n, i) {
            cin >> in.at(i);
        }
        dp[0][128+255] = 0;
        REP(n, i) {
            for (Int k = -255; k <= 255; k++) {
                Int indexedk = k + 255;
                if (dp[i][indexedk] != 1e15) {
                    REP(m, p) {
                        Int nextm = min(max(k + code.at(p),(Int)0),(Int)255);
                        Int indexedm = nextm+255;
                        Int nextwa = dp[i][indexedk] + pow((nextm - in.at(i)),2);
                        if (dp[i+1][indexedm] > dp[i][indexedk] + (nextm - in.at(i)) * (nextm - in.at(i))) {
                            dp[i+1][indexedm] = dp[i][indexedk] + (nextm - in.at(i)) * (nextm - in.at(i));
                        }
                    }
                }
            }
        }
        Int maxer = 1e15;
        for (Int i = 0; i <= 510; i++){
            if (dp[n][i] != 1e15) maxer = min(maxer,dp[n][i]);
        }
/*        for(Int k = 0; k <= 510; k++){

            cout << k -255 << " : ";
            REP(n + 1, i){
                cout << dp[i][k] << " ";
            }
            cout << endl;
        }*/

        cout << maxer << endl;
    }

}

C++: #include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define repl(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define rep(i,n) repl(i,0,n)
#define each(itr,v) for(auto itr:v)
#define pb(s) push_back(s)
#define maxch(x,y) x=max(x,y)
#define minch(x,y) x=min(x,y)
#define mp(a,b) make_pair(a,b)
#define all(x) (x).begin(),(x).end()
#define dbg(x) cout<<#x"="<<x<<endl
#define maxch(x,y) x=max(x,y)
#define minch(x,y) x=min(x,y)
#define uni(x) x.erase(unique(all(x)),x.end())
template<class T,class U>inline void chmin(T &t,U f){if(t>f)t=f;}
template<class T,class U>inline void chmax(T &t,U f){if(t<f)t=f;}
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define MIN(a, b) ((a) > (b) ? (b) : (a))

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> P;
typedef pair<P, int> PPI;

#define INF INT_MAX/3
#define MAX_N 1000
ll n,m;
ll dp[20001][256];
ll c[16],x[20000];
ll rec(ll p,ll y){
  if(dp[p][y] >= 0) return dp[p][y];

  if(p == n) return 0;

  long ret=LONG_MAX;
    for(ll i=0; i<m; ++i){ //??????????????????????????¨????????????????????°????????????
        ll ny = y+c[i];
        if(ny<0) ny=0;
        else if(ny>255) ny=255;

        ret = MIN(ret, rec(p+1,ny)+(ny-x[p])*(ny-x[p]));
    }
    return dp[p][y]=ret;
}
void solve(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  while(1){
    cin>>n>>m;
    if(n==0) break;
    rep(i,m) cin>>c[i];
    rep(i,n) cin>>x[i];
    memset(dp,-1,sizeof(dp));
    printf("%lld\n",rec(0,128));
  }

}
int main(){
  solve();
  return 0;
}