Go: package main

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

var sc = bufio.NewScanner(os.Stdin)
var route [][]int

func scanInt() int {
	num, _ := strconv.Atoi(scanString())
	return num
}

func scanString() string {
	sc.Scan()
	return sc.Text()
}

func init() {
	sc.Split(bufio.ScanWords)
}

func dfs(h, w int) {
	if route[h][w] == 0 {
		return
	}

	route[h][w] = 0
	for _, x := range []int{-1, 0, 1} {
		for _, y := range []int{-1, 0, 1} {
			if route[h+x][w+y] == 0 {
				continue
			}
			dfs(h+x, w+y)
		}
	}
}

func main() {
	writer := bufio.NewWriter(os.Stdout)
	for {
		w, h := scanInt(), scanInt()
		if w == 0 && h == 0 {
			break
		}

		route = make([][]int, h+2)
		route[0] = make([]int, w+2)
		for i := 1; i <= h; i++ {
			route[i] = make([]int, w+2)
			for j := 1; j <= w; j++ {
				route[i][j] = scanInt()
			}
		}
		route[h+1] = make([]int, w+2)

		total := 0
		for i := 1; i <= h; i++ {
			for j := 1; j <= w; j++ {
				if route[i][j] == 1 {
					total++
					dfs(i, j)
				}
			}
		}
		fmt.Fprintln(writer, total)
	}
	writer.Flush()
}

C++: #define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define USE_LLONG_AS_INT
#ifdef USE_LLONG_AS_INT
#define int long long
#define inf (1ll<<60)
#else
#define inf (1<<30)
#endif
#define rep(i,n) for(int i=0;i<n;i++)
#define Rep(i,a,b) for(int i=a;i<b;i++)
#define REP(i,a,b) for(int i=a;i<=b;i++)
#define rev(i,n) for(int i=(n)-1;i>=0;i--)
#define vi vector<int>
#define vvi vector<vi>
#define pb push_back
#define pi pair<int,int>
#define vp vector<pair<int,int>>
#define mp make_pair
#define all(v) (v).begin(),(v).end()
#define fi first
#define se second
#define MEMSET(a) memset(a,0,sizeof(a))
#define Yes(f) cout<<(f?"Yes":"No")<<endl
#define yes(f) cout<<(f?"yes":"no")<<endl
#define YES(f) cout<<(f?"YES":"NO")<<endl
#define SORT(v) sort(all(v))
#define RSORT(v) sort(all(v), greater<int>())

using namespace std;

const int mod=1e9+7;
const string sp=" ";

void run();

void init() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout<<fixed<<setprecision(12);
}

signed main(){
    init();
    run();
    return 0;
}

bool is_valid(int h,int w,int i,int j){
    return 0<=i&&i<h&&0<=j&&j<w;
}

void run(){
    int w,h;
    cin>>w>>h;
    if(!w)return;
    vvi c(h,vi(w));
    rep(i,h)rep(j,w)cin>>c[i][j];
    bool visited[h][w]={};
    queue<pi> q;
    int ans=0;
    int dx[]={1,1,0,-1,-1,-1,0,1},dy[]={0,1,1,1,0,-1,-1,-1};
    rep(i,h){
        rep(j,w){
            if(c[i][j]){
                ans++;
                q.push({i,j});
                visited[i][j]=true;
                while(!q.empty()){
                    pi p=q.front();
                    q.pop();
                    int y=p.fi,x=p.se;
                    c[y][x]=0;
                    rep(k,8){
                        int ny=y+dy[k],nx=x+dx[k];
                        if(is_valid(h,w,ny,nx)&&c[ny][nx]&&!visited[ny][nx]){
                            visited[ny][nx]=true;
                            q.push({ny,nx});   
                        }
                    }
                }
            }
        }
    }
    cout<<ans<<endl;
    run();
}

C++: #include <iostream>
#include <math.h>
#include <algorithm>
#include <vector>
using std::cin;
using std::cout;
using std::endl;
using std::string;
using std::vector;
				
				
void del_island(int i,int j,vector<vector<int>> &v){	
	v[i][j] = 0;
	if(v[i-1][j] == 1){
		del_island(i-1,j,v);
	}
	if(v[i+1][j] == 1){
		del_island(i+1,j,v);
	}
	if(v[i][j-1] == 1){
		del_island(i,j-1,v);
	}
	if(v[i][j+1] == 1){
		del_island(i,j+1,v);
	}
	if(v[i-1][j-1] == 1){
		del_island(i-1,j-1,v);
	}
	if(v[i-1][j+1] == 1){
		del_island(i-1,j+1,v);
	}
	if(v[i+1][j-1] == 1){
		del_island(i+1,j-1,v);
	}
	if(v[i+1][j+1] == 1){
		del_island(i+1,j+1,v);
	}

}


int count_island(int w, int h,vector<vector<int>> v){
	int count = 0;
	for(int i = 1 ; i <= h ;i++){
		for(int j = 1 ;j <= w ;j++){
			//cout << v[i][j] ;
			if(v[i][j] == 1){
				count++;
				//cout << "hello" <<endl;
				del_island(i,j,v);
			}
		}
	}
	return count;
}
	
int main(){ 
	int w,h;
	vector<vector<int>> v(60,vector<int>(60,0));
	int count;

	while(1){
		cin >> w >> h;
		if(w == 0 && h == 0){
			break;
		}
		count = 0; 

		for(int i = 1;i <= h; i++){
			for(int j = 1; j <= w; j++){
				cin >> v[i][j];
			}
		}

		count = count_island(w,h,v);


		cout << count << endl;
	}
}

C++: #include <bits/stdc++.h>
#define _overload(_1,_2,_3,name,...) name
#define _rep(i,n) _range(i,0,n)
#define _range(i,a,b) for(int i=(int)(a);i<(int)(b);++i)
#define rep(...) _overload(__VA_ARGS__,_range,_rep,)(__VA_ARGS__)
#define _all(arg) begin(arg),end(arg)

template<class T>bool chmax(T &a, const T &b) { return (a<b)?(a=b,1):0; }
template<class T>bool chmin(T &a, const T &b) { return (b<a)?(a=b,1):0; }

using namespace std;
using vi=vector<int>;
using vii=vector<vi>;

const int dx[8] = {1, 1, 0, -1, -1, -1, 0, 1};
const int dy[8] = {0, 1, 1, 1, 0, -1, -1, -1};

int w, h;

int dfs(vii &m, int pos_h, int pos_w) {
	int res = 0;
	if(0 <= pos_h && pos_h < h
	&& 0 <= pos_w && pos_w < w
	&& m[pos_h][pos_w] == 1) {
		m[pos_h][pos_w] = 0;
		res++;
	}
	else {
		return 0;
	}
	rep(i, 8) {
		res += dfs(m, pos_h+dx[i], pos_w+dy[i]);
	}
	return (res)?1:0;
}

int main(void){
	while(cin >> w >> h, w&&h) {
		vii m(h, vi(w));
		rep(i,h) rep(j,w) { cin >> m[i][j]; }
		int res = 0;
		rep(i,h) rep(j,w) res += dfs(m, i, j);
		cout << res << endl;
	}
	return 0;
}

C++: #include <iostream>
#include <vector>
#include <queue>

using namespace std;
const int dx[] = {-1, -1, -1, 0, 0, 1, 1, 1};
const int dy[] = {-1, 0, 1, -1, 1, -1, 0, 1};

int main(void) {
	int w,h;
	while(cin >> w >> h && w && h) {
		vector< vector<int> > data(w+2,vector<int>(h+2,0));
		for (int i = 1; i <= h; ++i) {
			for (int j = 1; j <= w; ++j) {
				cin >> data[i][j];
			}
		}

		int nx,ny;
		int count = 0;
		queue<int> fx,fy;
		for (int i = 1; i <= h; ++i) {
			for (int j = 1; j <= w; ++j) {
				if (data[i][j] == 1) {
					nx = j;
					ny = i;
					data[i][j] = 0;
					fx.push(nx);
					fy.push(ny);
					++count;

					while (!fx.empty()) {
						nx = fx.front();
						ny = fy.front();
						fx.pop();
						fy.pop();
						for (int d = 0; d < 8; ++d) {
							if (data[ny+dy[d]][nx+dx[d]] == 1) {
								fx.push(nx+dx[d]);
								fy.push(ny+dy[d]);
								data[ny+dy[d]][nx+dx[d]] = 0;
							}
						}
					}
				}
			}
		}
		cout << count << endl;
	}
	return 0;
}

C++: #include<bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=a;i<b;++i)

int m[55][55];
void dfs(int x,int y){
  m[y][x]=0;
  FOR(i,y-1,y+2) FOR(j,x-1,x+2)
    if(i>=0 && j>=0 && m[i][j]) dfs(j,i);
}

int main(){
  int w,h;
  while(cin>>w>>h,w){
    int ans=0;
    
    FOR(i,0,h) FOR(j,0,w){
      int c; cin>>c;
      m[i][j]=c;
    }
    
    FOR(i,0,h) FOR(j,0,w){
      if(m[i][j]){
	dfs(j,i);
	ans++;
      }
    }
    
    cout<<ans<<endl;
  }
  return 0;
}

C++: #include<iostream>
#include<vector>

using namespace std;

#define rep(i, n) for(int i=0; i<(n); ++i)
const int dx[] = {-1, -1, 0, 1, 1, 1, 0, -1}, dy[] = {0, -1, -1, -1, 0, 1, 1, 1};

int w, h;
vector<vector<int> > c;

inline bool inrect(int x, int y){
    return 0 <= x && x < h && 0 <= y && y < w;
}

void visit(int x, int y){
    rep(k, 8){
        int nx = x + dx[k], ny = y + dy[k];
        if(!inrect(nx, ny) || !c[nx][ny])continue;
        c[nx][ny] = 0;
        visit(nx, ny);
    }
}

int solve(){
    int res = 0;
    rep(i, h)rep(j, w)if(c[i][j])visit(i, j), res++;
    return res;
}

int main(){
  while(cin >> w >> h, w|h){
      c.assign(h, vector<int>(w, 0));
      rep(i, h)rep(j, w)cin >> c[i][j];
      cout << solve() << '\n';
  }
  return 0;
}