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<bits/stdc++.h>
using namespace std;
#define lp(i,n) for(int i=0;i<n;i++)
#define lpin(a,i,n) for(int i=0;i<n;i++){cin>>a[i];}
int dp[25000][300];
int  main(){
  while(1){
    int n,m;
    cin>>n>>m;
    int c[20],x[25000];
    if(n==0&& m==0) break;
    lp(i,25000){
      lp(j,300){
	dp[i][j]=-1;
      }
    }
    lpin(c,i,m);
    lpin(x,i,n);
    dp[0][128]=0;
    for(int i=1;i<=n;i++){
      lp(j,256){
	if(dp[i-1][j]!=-1){
	  lp(k,m){
	    if(dp[i][max(min(j+c[k],255),0)]==-1){
	      dp[i][max(min(j+c[k],255),0)]=dp[i-1][j]+(max(min(j+c[k],255),0)-x[i-1])*(max(min(j+c[k],255),0)-x[i-1]);
	    }
	    else
	    dp[i][max(min(j+c[k],255),0)]=min(dp[i-1][j]+(max(min(j+c[k],255),0)-x[i-1])*(max(min(j+c[k],255),0)-x[i-1]),dp[i][max(min(j+c[k],255),0)]);
	  }
	}
      }
    }
    int ans=10000000;
    lp(i,300){
      if(dp[n][i]!=-1)
      ans=min(ans,dp[n][i]);
    }
    cout<<ans<<endl;
  }
  return 0;
}

C++: #include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <complex>
#include <queue>
#include <map>
#include <set>
#include <cstring>
#include <cstdlib>
#include <string>
#include <cmath>
using namespace std;

#define REP(i,n) for(int i=0;i<(int)n;++i)
#define FOR(i,c) for(__typeof((c).begin())i=(c).begin();i!=(c).end();++i)
#define ALL(c) (c).begin(), (c).end()
const int INF = 1<<29;

int main() {
  int n,m;
  while(cin>>n>>m,n) {
    int c[m];
    REP(i,m)
      cin >> c[i];
    int x[m];
    REP(i,n)
      cin >> x[i];
    int dp[256];
    REP(i,256) dp[i] = INF;
    dp[128] = 0;
    
    REP(i,n) {
      int next[256];
      REP(j,256) next[j] = INF;
      REP(j,256) {
        REP(k,m) {
          int hoge = max(min(j+c[k], 255), 0);
          next[hoge] = min(next[hoge], dp[j] + (hoge-x[i])*(hoge-x[i]));
        }
      }
      // REP(j,256){
      //   if (next[j]!=INF)
      //     printf("%d,%d ",j,next[j]);
      // }
      // cout << endl;
      memcpy(dp, next, sizeof(next));
    }
    cout << *min_element(dp, dp+256) << endl;
  }
}

C++: #include<iostream>
#include<string>
#include<algorithm>
#include<set>
#include<map>
#include<vector>
#include<stack>
#include<queue>
#include<cmath>
#include<numeric>
#include<cstdlib>
#include<cassert>
#include<random>
using namespace std;

const int e=1e9+7;

int cut(int n){
    if(n>255){n=255;}
    if(n<0){n=0;}
    return n;
}

int dp[25000][256];


int main(){
    while(1){
    
        
        
    int n,m;
    fill(&dp[0][0],&dp[24999][256],e);
    vector<int> in,c;
    cin>>n>>m;
        if(n==0 && m==0){break;}
    for(int i=0;i<m;i++){
        int d;
        cin>>d;
        c.push_back(d);
    }
    for(int i=0;i<n;i++){
        int d;
        cin>>d;
        in.push_back(d);
    }
    dp[0][128]=0;
    
    for(int i=0;i<n;i++){
        for(int t=0;t<256;t++){
            for(int h=0;h<c.size();h++){
                if(dp[i][t]!=e){
                    dp[i+1][cut(t+c[h])]=min(dp[i+1][cut(t+c[h])],dp[i][t]+(int)pow((in[i]-cut(t+c[h])),2));
                }
            }
        }
    }
    int ans=e;
    for(int i=0;i<256;i++){
        ans=min(ans,dp[n][i]);
    }
    cout<<ans<<endl;
    
        
        
    }
    return 0;
}

C++: #include <bits/stdc++.h>

using namespace std;

int N, M;
int C[17], x[20001];
int dp[256][20001];

int rec(int now, int cnt) {
  if ( cnt == N ) return 0;
  if ( dp[now][cnt] != -1 ) return dp[now][cnt];

  int ret = 1e8;
  for ( int i = 0; i < M; i++ ) {
    int tmp = max(0, min(255, now + C[i]));
    ret = min(ret, rec(tmp, cnt + 1) + (x[cnt] - tmp) * (x[cnt] - tmp));
  }

  return dp[now][cnt] = ret;
}

int main()
{
  while ( cin >> N >> M, N | M ) {
    for ( int i = 0; i < M; i++ ) cin >> C[i];
    for ( int i = 0; i < N; i++ ) cin >> x[i];
    
    fill_n(*dp, 256 * 20001, -1);
    
    cout << rec(128, 0) << endl;
  }
}