Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

func main() {
	io := NewIo()
	defer io.Flush()
	for {
		sum := io.NextInt();
		if sum == 0 {
			break
		}
		for i := 0; i < 9; i++ {
			sum -= io.NextInt()
		}
		io.Println(sum)
	}
}

// I/O template
type Io struct {
	reader    *bufio.Reader
	writer    *bufio.Writer
	tokens    []string
	nextToken int
}

func NewIo() *Io {
	return &Io{
		reader: bufio.NewReader(os.Stdin),
		writer: bufio.NewWriter(os.Stdout),
	}
}

func (io *Io) Flush() {
	err := io.writer.Flush()
	if err != nil {
		panic(err)
	}
}

func (io *Io) NextLine() string {
	var buff []byte
	for {
		line, isPrefix, err := io.reader.ReadLine()
		if err != nil {
			panic(err)
		}
		buff = append(buff, line...)
		if !isPrefix {
			break
		}
	}
	return string(buff)
}

func (io *Io) Next() string {
	for io.nextToken >= len(io.tokens) {
		line := io.NextLine()
		io.tokens = strings.Fields(line)
		io.nextToken = 0
	}
	s := io.tokens[io.nextToken]
	io.nextToken++
	return s
}

func (io *Io) NextInt() int {
	i, err := strconv.Atoi(io.Next())
	if err != nil {
		panic(err)
	}
	return i
}

func (io *Io) NextFloat() float64 {
	i, err := strconv.ParseFloat(io.Next(), 64)
	if err != nil {
		panic(err)
	}
	return i
}

func (io *Io) Println(a ...interface{}) {
	fmt.Fprintln(io.writer, a...)
}

func (io *Io) Printf(format string, a ...interface{}) {
	fmt.Fprintf(io.writer, format, a...)
}

func (io *Io) PrintIntSlice(a []int) {
	b := []interface{}{}
	for _, x := range a {
		b = append(b, x)
	}
	io.Println(b...)
}

func (io *Io) PrintStringSlice(a []string) {
	b := []interface{}{}
	for _, x := range a {
		b = append(b, x)
	}
	io.Println(b...)
}

func Log(name string, value interface{}) {
	fmt.Fprintf(os.Stderr, "%s=%+v\n", name, value)
}

func ExampleIo() {
	io := NewIo()
	defer io.Flush()
	a := make([]int, 0, 3)
	a[0], a[1], a[2] = io.NextInt(), io.NextInt(), io.NextInt()
	io.Println(a)
	io.PrintIntSlice(a)
	Log("io", a)
}

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

int main()
{
	//レシート

	int N;
	int sum = 0;
	int ans[5];
	int k =0 ;
	while (true)
	{
		cin >> N;
		if (N == 0) break;
			int a;
		for (int j = 0; j < 9; j++) {
			cin >> a;
			sum += a;
		}
		cout << N - sum << endl;
	}

	//コンテスト	
	/*
	int W[10], K[10];
	for (int i = 0; i < 10; i++) {
		cin >> W[i];
	}
	for (int i = 0; i < 10; i++) {
		cin >> K[i];
	}
	sort(W, W + 10);
	reverse(W, W + 10);
	sort(K, K + 10);
	reverse(K, K + 10);
	cout << W[0] + W[1] + W[2] << " " << K[0] + K[1] + K[2] << endl;
	*/
	//ポイントカード
	/*
	int N, M;
	cin >> N >> M;
	int a;
	int A[5000];
	int b = 0;
	int x = 0;
	for (int i = 0; i <  M; i++) {
		cin >> a;
		if (a < N) {
			A[x]=a;
			x++;
		}
		else
		{
			b++;
		} 
		cin >> a;
	}
	int sum = 0;
	if (b < M - 1) {
		sort(A, A+x);
		reverse(A, A+x);
		for (int i = 0; i < M - 1 - b; i++) {
			sum += N - A[i];
		}
	}
	cout << sum << endl;
	*/

	//合計時間
	/*
	int sum=0, n;
	for (int i = 0; i < 4; i++) {
	cin >> n;
	sum += n;
	}
	cout << sum / 60 << endl;
	cout << sum % 60 << endl;
	//平均点
	/*
	int P[5];
	int sum=0;
	for (int i = 0; i < 5; i++) {
	cin >> P[i];
	if (P[i] < 40) P[i] = 40;
	sum += P[i];
	}
	cout << sum / 5 << endl;
	*/
	//投票
	/*
	int N, M;
	cin >> N >> M;
	int A[1000], vote[1000];
	for (int i = 0; i < N; i++) {
	cin >> A[i];
	vote[i] = 0;
	}
	int b;
	for (int i = 0; i < M; i++) {
	cin >> b;
	for (int j = 0; j < N; j++) {
	if (A[j] <= b) {
	vote[j]++;
	break;
	}
	}
	}
	int temps = 0, ans;
	for (int i = 0; i < N; i++) {
	if (vote[i] > temps) {
	temps = vote[i];
	ans = i;
	}
	}
	cout << ans + 1 << endl;
	*/

	//2.すごろく	
	/*
	int n;
	cin >> n;
	int A, _A = 1;
	int k = 0;
	int A_count[100];
	A_count[0] = 1;
	for (int i = 0; i < n; i++)
	{
	cin >> A;
	if (A == 1)
	{
	if (A == _A)
	{
	A_count[k]++;
	}
	else
	{
	k++;
	A_count[k] = 2;
	}
	}
	_A = A;
	}
	sort(A_count, A_count + k + 1);
	cout << A_count[k] << endl;
	*/

	//タイムカード
	/*
	int t[2][3];
	int x[3][3];
	for (int n=0; n < 3; n++)
	{
	for (int i=0; i < 2; i++)
	for (int k=0; k < 3; k++)
	cin >> t[i][k];

	for (int m = 2; m >= 0; m--)
	{
	x[n][m] = t[1][m] - t[0][m];
	if (t[0][m] > t[1][m])
	{
	x[n][m] += 60;
	t[1][m - 1]--;
	}
	}
	}
	for (int n= 0; n < 3; n++)
	{
	cout << x[n][0] << ' ' << x[n][1] <<' '<< x[n][2] << endl;
	}
	*/



	return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;

int main(){
  
 while(true){
   int total;  
   cin >> total;
  
  vector<int> price(9);
 
  int total2 = 0;
  
  for(int i = 0; i < 9; i++){
    
    cin >> price.at(i);
    
    if(price.at(0) == 0){
      return 0;
    }
    
    else{total2 = total2 + price.at(i);}
  }
  
  cout << total - total2 << endl;
 }
    
}

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

int main() {

  int a, b;
  while( cin >> a, a ) {
    for(int i=0; i<9; i++) {
      cin >> b;
      a -= b;
    }
    
    cout << a << endl;
  }
}

C++: #include<iostream>
using namespace std;
int main(){
	int A;
	int B;
	cin >> A;
	while (1){
		if (A == 0) break;
		for (int i = 0; i < 9; i++){
			cin >> B;
			A -= B;
		}
		cout << A << endl;
		cin >> A;
		
	}
	return 0;
}

C++: #include <iostream>

using namespace std;

void solve()
{
	int sum;
	while(cin >> sum, sum)
	{
		for(int i = 0; i < 9; ++i)
		{
			int price;
			cin >> price;
			sum -= price;
		}
		cout << sum << endl;		
	}
}

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

C++: #include<iostream>
#include<string>
using namespace std;
int main(){
	int n;
	int a[9];
	while(true){
	cin>>n;
	if(n==0)
		break;
	int h=0;
	for(int i=0;i<9;i++){
		cin>>a[i];
		h+=a[i];
	}
	cout<<n-h<<endl;
	}
	return 0;
}

C++: //26
#include<iostream>

using namespace std;

int main(){
  for(int s;cin>>s,s;){
    for(int i=0;i<9;i++){
      int v;
      cin>>v;
      s-=v;
    }
    cout<<s<<endl;
  }
  return 0;
}

C++: #include<stdio.h>
int main(){
  int a,b,i;
  scanf("%d",&a);
  for(i=0;i<9;i++){
    scanf("%d",&b);
    a-=b;
  }
  printf("%d\n",a);
}

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

#define REP(i,b,n) for(int i=b;i<n;i++)
#define rep(i,n) REP(i,0,n)

int s;

void solve() {
  int rc[9];
  rep(i,9) cin>>rc[i];
  rep(i,9) s-=rc[i];
  cout<<s<<endl;
}

int main (int argc, char const* argv[]) {
  while (cin>>s, s) {
    solve();
  }
  return 0;
}

C++: #include<iostream>
#include<string>
#include<cstring>
using namespace std;

int main()
{
	int num1,num2,num3,num4,num5,num6,num7,num8,num9,num10,num11;
	for(int i=0;i<150;i++){
	cin>>num1>>num2>>num3>>num4>>num5>>num6>>num7>>num8>>num9>>num10;
	if(num1==0){
		return 0;
	}
	num11=num1-num2-num3-num4-num5-num6-num7-num8-num9-num10;
	cout<<num11;
	cout<<"\n";
	}
	return 0;
}

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

int main()
{
    int a; int b; int c; int d; int e; int f; int g; int h; int i; int j;
    cin >> a >> b >> c >> d >> e >> f >> g >> h >> i >> j;
    cout << a-(b+c+d+e+f+g+h+i+j) << '\n';

    return 0;
}

C++: #include<iostream>
#include<string>
#include<vector>
#include<stdio.h>
#include<algorithm>
using namespace std;
int main(){
	int A,b;
	while(1){
		cin>>A;
		if(A==0)break;
		for(int i=0;i<9;i++){
		cin>>b;
		A=A-b;
		}
		cout<<A<<endl;
	}
}

C++: #include <bits/stdc++.h>
using namespace std;

int main(){
  int x1, x2, x3, x4, x5, x6, x7, x8, x9, x10;
  cin>>x1>>x2>>x3>>x4>>x5>>x6>>x7>>x8>>x9>>x10;
  cout<<x1 - ( x2 + x3 + x4 + x5 + x6 + x7 + x8 + x9 + x10)<<endl;

  return 0;
}

C++: #include <bits/stdc++.h>
typedef long long LL;
using namespace std;

int main() {
  int n;
  cin >> n;
  int sum = 0;
  while (true) {
    int t;
    cin >> t;
    if (t == 0) break;

    sum += t;
  }

  cout << n - sum << endl;
}

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

int main(){

  int n;
  while(cin >> n, n){
    int a,ans = 0;

    for(int i=0;i<9;i++){
      cin >> a;
      ans += a;
    }

    cout << n - ans << endl;
  }
}