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 <iomanip>
#include <sstream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <climits>
#include <cfloat>
#include <vector>
#include <string>
#include <stack>
#include <queue>
#include <set>
#include <map>
#include <algorithm>
#include <functional>
#include <utility>
#include <numeric>
#include <iterator>

using namespace std;

typedef long long LL;
typedef unsigned long long ULL;
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int,int> PII;
typedef vector<PII> VPII;
typedef istringstream ISS;
typedef ostringstream OSS;

#define REP( i, m, n ) for ( int i = (int)( m ); i < (int)( n ); ++i )
#define FOR( v, c ) for ( auto &v : c )
#define EACH( it, c ) for ( auto it = c.begin(); it != c.end(); ++it )
#define ALL( c ) (c).begin(), (c).end()
#define DRANGE( c, p ) (c).begin(), (c).begin() + p, (c).end()

#define PB( n ) push_back( n )
#define MP( a, b ) make_pair( ( a ), ( b ) )
#define EXIST( c, e ) ( (c).find( e ) != (c).end() )

#define fst first
#define snd second

#define DUMP( x ) cerr << #x << " = " << ( x ) << endl
#define DEBUG( x ) cerr << __FILE__ << ":" << __LINE__ << ": " << #x << " = " << ( x ) << endl

int main()
{
	cin.tie( 0 );
	ios::sync_with_stdio( false );

	for ( int n, m; cin >> n >> m, n | m; )
	{
		VI cs( m ), xs( n );
		FOR( c, cs )
		{
			cin >> c;
		}
		FOR( x, xs )
		{
			cin >> x;
		}

		VVI dp( n + 1, VI( 256, INT_MAX / 2 ) );
		dp[0][128] = 0;

		REP( i, 0, n )
		{
			REP( j, 0, 256 )
			{
				REP( k, 0, m )
				{
					int nextx = j + cs[k];
					nextx = min( nextx, 255 );
					nextx = max( nextx, 0 );
					dp[ i + 1 ][ nextx ] = min( dp[ i + 1 ][ nextx ], dp[i][j] + ( xs[i] - nextx ) * ( xs[i] - nextx ) );
				}
			}
		}

		cout << *min_element( ALL( dp.back() ) ) << endl;
	}

	return 0;
}

C++: #include <iostream>
#include <vector>
#include <algorithm>
#include <cstdio>
using namespace std;

int main()
{
  int N, M;
  while (cin >> N >> M) {
    if (N == 0 && M == 0)
      break;

    vector<int> C(M);
    for (int i = 0; i < M; ++i)
      scanf("%d", &C[i]);

    vector<int> X(N);
    for (int i = 0; i < N; ++i)
      scanf("%d", &X[i]);

    const int INF = 1 << 30;
    static int dp[20000+1][256];
    for (int i = 0; i < 20000+1; ++i) {
      for (int j = 0; j < 256; ++j)
	dp[i][j] = INF;
    }
    dp[0][128] = 0;

    for (unsigned int i = 0; i < X.size(); ++i) {
      for (int j = 0; j < 256; ++j) {
	for (unsigned int k = 0; k < C.size(); ++k) {
	  int XX = j+C[k];
	  if (XX < 0)
	    XX = 0;
	  if (XX > 255)
	    XX = 255;
	  dp[i+1][XX] = min(dp[i+1][XX], dp[i][j] + (X[i]-XX)*(X[i]-XX));
	}
      }
    }

    int ans = INF;
    for (int i = 0; i < 256; ++i)
      ans = min(ans, dp[N][i]);

    cout << ans << endl;
  }
  return 0;
}

C++: #include<iostream>
#include<string>
#include<vector>
#include<cstdio>
#include<sstream>
#include<algorithm>
#include<cmath>
#include<map>
#include<functional>
#include<queue>
#include<stack>
#include<set>
using namespace std;
int ta[20],c[25000];
int dp[20000][256];
const int INF=1500000000;
int main(){
	int n,m;
	while(cin>>n>>m,n+m){
	for(int i=0;i<m;i++)cin>>ta[i];
	for(int j=0;j<n;j++)cin>>c[j];
	
	for(int i=0;i<20000;i++)fill(dp[i],dp[i]+256,INF);
	dp[0][128]=0;
	for(int i=0;i<n;i++){
		for(int j=0;j<256;j++){
			if(dp[i][j]!=INF){
				int tmp=j;
				for(int k=0;k<m;k++){
					if(j+ta[k]<0)tmp=0;
					else if(j+ta[k]>255)tmp=255;
					else tmp=j+ta[k];
					dp[i+1][tmp]=min( dp[i+1][tmp] ,dp[i][j]+ (c[i]-tmp)*(c[i]-tmp) );
				}
			}//endif
		}
	}
	/*for(int i=0;i<=n;i++){
		for(int j=120;j<=140;j++){
		cout<<dp[i][j]<<" ";
		}
		cout<<"\n";
	}*/
	int ans=INF;
	for(int i=0;i<256;i++)ans=min(ans,dp[n][i]);
	cout<<ans<<endl;
	}
	return 0;
}

C++: #include<string>
#include <vector>
#include <stack>
#include <map>
#include<iostream>
#include <algorithm>
#include <functional>

using namespace std;
int n;
int m;
int price;
int a;
int b;

struct G{
	string name;
	double value;
};
bool operator>(const G& left, const G& right)
{
	if(left.value>right.value){
		return true;
	}else if(left.value<right.value){
		return false; 
	}else{
		return left.name<right.name;
	}
}

bool operator<(const G& left, const G& right)
{
  	if(left.value>right.value){
		return false;
	}else if(left.value<right.value){
		return true; 
	}else{
		return left.name>right.name;
	}
}



int main(){
	while(true){
		cin >>n;
		cin >>m;

		if(n==0){
			break;
		}
		vector<int> codebook;
		vector<int> data;
		for(int i=0;i<m;i++){
			cin >> a;
			codebook.push_back(a);
		}
		for(int i=0;i<n;i++){
			cin >> a;
			data.push_back(a);
		}
		//値,誤差値でハッシュ。
		map<int,int> hash;
		hash[128]=0;

		for(int i=0;i<n;i++){
			int d=data[i];//次のデータ
			map<int,int>::iterator it = hash.begin();		
			map<int,int> next_hash;
			while( it != hash.end() )
			{
				for(int k=0;k<m;k++){
					int f=max(min((*it).first+codebook[k],255),0);
					int div=f-d;
					int s=(*it).second+div*div;
					if(next_hash.find(f)!= next_hash.end()){
						next_hash[f]=min(next_hash[f],s);
					}else{
						next_hash[f]=s;
					}
				}
				++it;
			}
			hash=next_hash;
		}
		int mi=2147483657;
		map<int,int>::iterator it = hash.begin();
		while( it != hash.end() )
		{
			mi=min((*it).second,mi);
			it++;
		}
		cout << mi <<endl;
	}
}