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

	for(int i=0; i < 5; i++)
	{
		int N;
		cin >> N;
		if (N = 0) break;
		int sum = 0;
			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(){
	int m,k;
	cin>>m;
	for(int n=0; n<9; n++ ){
	cin>>k;
	m-=k;
	}
	cout<<m<<endl;
	return 0;
}

C++: #include <iostream>
using namespace std;
int main()
{
	int N,price;
		while(cin>>N){
		if(N==0) break;
			for(int i=0;i<10;i++){
			cin>>price;
			N=N-price;
			}
			cout<<N<<endl;
		}
	return 0;
}

C++: #include <iostream>
#include <cmath>
#include <algorithm>
#include <cstdio>
#include <sstream>
#include <string>
#include <map>
#include <set>
using namespace std;

#define loop(i,a,b) for(int i=(a);i<int(b);i++)
#define rep(i,b) loop(i,0,b)
#define all(c) (c).begin(), (c).end()

int main(){
    int s;
    while(cin >> s && s){
        rep(i,9){
            int p;cin>>p;
            s-=p;
        }
        cout << s << endl;
    }
}

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

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

C++: #include<iostream>

using namespace std;

 int main(){
    int sam,p[9];
    cin >> sam;
if(sam == 0)
break;
    for(int i = 0; i < 9; i++){
        cin >> p[i];
    }
    
    for(int i = 0; i < 9; i++){
        sam -= p[i];
    }
    
    cout << sam << endl;
}

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

int main(void){
	int sum;

	while(cin>>sum && sum){
		for(int i=0;i<9;i++){
			int x;
			cin>>x;
			sum -= x;
		}
		cout<<sum<<endl;
	}

	return 0;
}

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


int main(){
    long long int n;
    cin>>n;
    while(n!=0){
        long long int a,b,c,d,e,f,g,h,i;
        cin>>a>>b>>c>>d>>e>>f>>g>>h>>i;
        cout<<n-a-b-c-d-e-f-g-h-i<<endl;
        cin>>n;
    }
   return 0;
}

C++: #include<cstdio>
using namespace std;
int main(void)
{
	int i,j,x,kin,gou;
	scanf("%d",&gou);
	x=0;
	while(1){
		scanf("%d",&kin);
		x+=kin;
		if(kin==0){
			break;
		}
	}
	gou=gou-x;
	printf("%d\n",gou);
	return 0;
}

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

int main(){
int books=0;
int book=0;
cin>>books;
while(i<9){
cin>>book;
books-=book;
if(books==0){
break;
}
}
cout<<books<<'\n';

return 0;
}

C++: #include<bits/stdc++.h>
using namespace std;
#define REP(i,m,n) for(int i=(m);i<(n);i++)
#define rep(i,n) REP(i,0,n)
#define pb push_back
#define mp make_pair
#define all(c) (c).begin(),(c).end()
#define rall(c) (c).rbegin(),(c).rend()
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
const ll inf=1e9+7;
const ll mod=998244353;
int main(){
    while(1){
    ll sum;cin>>sum;
    if(sum==0)break;
    ll a=0;
    rep(i,9){
        ll b;cin>>b;
        sum-=b;
    }
    cout<<sum<<endl;
    }
}

C++: #include<iostream>

using namespace std;

int main(){
  int aa[10] = {0};
  int ans = 0, sum = 0;
  for(int i = 0; i < 10; i++)
    cin >> aa[i];
  for(int i = 1; i < 10; I++)
    sum += aa[i];
  ans = aa[0] - sum;
  cout << ans << endl;
  return 0;
}

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

int main(){
  int n,a;

  for(;;){
    cin >> n;
    if(!n)break;

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

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

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

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


  return 0;
}