Go: package main

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

const (
	initialBufSize = 100000
	maxBufSize     = 1000000
)

var sc *bufio.Scanner

func initScanner(r io.Reader) *bufio.Scanner {
	buf := make([]byte, initialBufSize)

	sc := bufio.NewScanner(r)
	sc.Buffer(buf, maxBufSize)
	sc.Split(bufio.ScanWords) // bufio.ScanLines
	return sc
}

func main() {
	sc = initScanner(os.Stdin)
	resolve()
}

func resolve() {
	results := []int{}
	for true {
		w, h := scanInt(sc), scanInt(sc)
		if w == 0 && h == 0 {
			break
		}
		grid := make([][]int, h)
		for i := 0; i < h; i++ {
			grid[i] = make([]int, w)
			for j := 0; j < w; j++ {
				grid[i][j] = scanInt(sc)
			}
		}
		num := 0
		for i := range loop0(h) {
			for j := range loop0(w) {
				start := pos{y: i, x: j}
				if grid[start.y][start.x] == 0 {
					continue
				}
				num++
				_dfs(grid, w, h, start)
			}
		}
		results = append(results, num)
	}
	for _, v := range results {
		fmt.Println(v)
	}
	return
}

func _dfs(grid [][]int, w, h int, start pos) {
	grid[start.y][start.x] = 0
	for _, df := range []pos{
		pos{1, 0}, pos{-1, 0},
		pos{0, -1}, pos{0, 1},
		pos{1, 1}, pos{-1, -1},
		pos{-1, 1}, pos{1, -1},
	} {
		np := addPos(start, df)
		if np.y < 0 || h <= np.y || np.x < 0 || w <= np.x {
			continue
		}
		if grid[np.y][np.x] == 0 {
			continue
		}
		_dfs(grid, w, h, np)
	}
}

type pos struct{ x, y int }

func addPos(p, d pos) pos {
	return pos{
		x: p.x + d.x,
		y: p.y + d.y,
	}
}

func loop0(n int) chan int {
	return loop(0, n-1, 1)
}

func loop1(n int) chan int {
	return loop(1, n, 1)
}

func loop(s, e, d int) chan int {
	ch := make(chan int)
	go func() {
		for i := s; i <= e; i += d {
			ch <- i
		}
		close(ch)
	}()
	return ch
}

// snip-scan-funcs
func scanInt(sc *bufio.Scanner) int {
	sc.Scan()
	i, _ := strconv.Atoi(sc.Text())
	return int(i)
}
func scanString(sc *bufio.Scanner) string {
	sc.Scan()
	return sc.Text()
}

C++: #include<iostream>
#include<queue>
#include<utility>
using namespace std;
void search(int, int);
int c[50][50] = {}, map[50][50] = {};
void mapDraw(int,int);
queue< pair<int, int> > q;
int w, h;

int main() {

	while (1) {
		
		//initialize
		int count = 0;
		for (int i = 0; i < 50; i++) {
			for (int j = 0; j < 50; j++) {
				c[i][j] = 0;
				map[i][j] = 0;
			}
		}


		cin >> w >> h;
		if (w == 0 && h == 0) break;
		//input
		for (int i = 0; i < h; i++) {
			for (int j = 0; j < w; j++) {
				cin >> c[i][j];
			}
		}

		//search
		//unresearched:0, land:2, sea:1
		for (int i = 0; i < h; i++) {
			for (int j = 0; j < w; j++) {
				if (map[i][j] == 0) {
					map[i][j] = c[i][j] + 1;
					if (c[i][j] == 1) {
						q.push(make_pair(i, j));
						count++;
					}
				}

				pair<int, int> cur = make_pair(i, j);
				while (!q.empty()) {
					cur = q.front();
					int x = cur.second;
					int y = cur.first;
					q.pop();

					//cerr << "( " << y << ", " << x << " )now"<< endl;

					for (int a = -1; a <= 1; a++) {
						for (int b = -1; b <= 1; b++) search(y + a, x + b);
					}
				}
			}
		}

		cout << count << endl;
	}


	return 0;
}

void search(int i, int j) {
	if (map[i][j] == 0) {
		map[i][j] = c[i][j] + 1;
		if (c[i][j] == 1) q.push(make_pair(i, j));
	}
	//mapDraw(w, h);
}

void mapDraw(int w, int h) {
	for (int i = 0; i < h; i++) {
		for (int j = 0; j < w; j++) {
			cerr << map[i][j];
		}
		cerr << endl;
	}
	cerr << endl;
}

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

struct pos{
	int x;
	int y;
};

int main(){
	int w, h;
	while(1){
		cin >> w >> h;
		if(w == 0 || h == 0) break;

		int marine[52][52];
		for(int i = 0; i < 52; i++){
			for(int j = 0; j < 52; j++){
				marine[i][j] = 0;
			}
		}

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

		stack<pos> st;
		int island = 0;
		for(int i = 1; i <= h; i++){
			for(int j = 1; j <= w; j++){
				//島を探す
				if(marine[i][j] == 1){
					pos p;
					p.y = i;
					p.x = j;
					st.push(p);
					marine[i][j] = 0;
					while(!st.empty()){
						pos p1 = st.top();
						st.pop();
						int x1[] = {-1,  0, 1, 0, -1,  1, 1, -1};
						int y1[] = {0 , -1, 0, 1, -1, -1, 1,  1};
						for(int k = 0; k < 8; k++){
							p = p1;
							p.y += y1[k];
							p.x += x1[k];
							if(marine[p.y][p.x] == 1){
								st.push(p);
								marine[p.y][p.x] = 0;
							}
						}
					}
					island++;
				}


			}
		}

		cout << island << endl;
	}
}

C++: #include<iostream>
using namespace std;
void dfs(int,int);
int a[52][52]={};

int main(){
  while(1){
    int count=0,w,h;
    cin>>w>>h;
    if(w+h==0)break;
    
    for(int i=1;i<=h;i++)
      for(int j=1;j<=w;j++)
	cin>>a[i][j];

    for(int i=1;i<=h;i++)
      for(int j=1;j<=w;j++)
	if(a[i][j]==1){
	  dfs(j,i);
	  count++;
	}
    cout<<count<<endl;  
  }
  return 0;
}

  void dfs(int x,int y){
    a[y][x]=0;
    int nx,ny;
    int dx[8]={1,1,1,0,-1,-1,-1,0};
    int dy[8]={1,0,-1,-1,-1,0,1,1};
    for(int k=0;k<8;k++){
	nx=x+dx[k];
	ny=y+dy[k];
	if(a[ny][nx]==1){
	  dfs(nx,ny);
	}
    }
  }

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

#define REP(i,m,n) for(int i=(m); i<(int)(n); i++)
#define RREP(i,m,n) for(int i=(int)(n-1); i>=m; i--)
#define rep(i,n) REP(i,0,n)
#define rrep(i,n) RREP(i,0,n)
#define all(a) (a).begin(),(a).end()
#define rall(a) (a).rbegin(),(a).rend()
#define aut(r,v) __typeof(v) r = (v)
#define each(it,o) for(aut(it,(o).begin()); it!=(o).end(); ++it)
#define reach(it,o) for(aut(it,(o).rbegin()); it!=(o).rend(); ++it)
#define fi first
#define se second
#define debug(...) {cerr<<"[L"<<__LINE__<<"] "; _debug(__VA_ARGS__);}

template<typename T1, typename T2> ostream& operator<<(ostream& o, const pair<T1, T2>& p)
{return o<<"("<<p.first<<", "<<p.second<<")";}
template<typename T>string join(const vector<T>&v, string del=", ")
{stringstream s;rep(i,v.size())s<<del<<v[i];return s.str().substr(del.size());}
template<typename T>ostream& operator<<(ostream& o, const vector<T>&v)
{if(v.size())o<<"["<<join(v)<<"]";return o;}
template<typename T>ostream& operator<<(ostream& o, const vector<vector<T> >&vv)
{int l=vv.size();if(l){o<<endl;rep(i,l){o<<(i==0?"[ ":",\n  ")<<vv[i]<<(i==l-1?" ]":"");}}return o;}
template<typename T>ostream& operator<<(ostream& o, const set<T>& st)
{vector<T> v(st.begin(),st.end());o<<"{ "<<join(v)<<" }";return o;}
template<typename T1, typename T2>ostream& operator<<(ostream& o, const map<T1, T2>& m)
{each(p,m){o<<(p==m.begin()?"{ ":",\n  ")<<*p<<(p==--m.end()?" }":"");}return o;}
inline void _debug(){cerr<<endl;}
template<class First, class... Rest>
void _debug(const First& first, const Rest&... rest){cerr<<first<<" ";_debug(rest...);}

typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vl;
typedef vector<vl> vvl;

const double PI = (1*acos(0.0));
const double EPS = 1e-9;
const ll INF = 0x3f3f3f3f;
const ll INFL = 0x3f3f3f3f3f3f3f3fLL;
const ll mod = 1e9 + 7;

inline void finput(string filename) {
    freopen(filename.c_str(), "r", stdin);
}

int di[] = {0, -1, -1, -1, 0, 1, 1, 1};
int dj[] = {1, 1, 0, -1, -1, -1, 0, 1};

int w,h;
vvi C;

void dfs(pii cur, pii pre, int num){
    int i = cur.fi, j = cur.se;
    C[i][j] = 0;
    rep(k,8){
        int ni = i+di[k];
        int nj = j+dj[k];
        if(ni < 0 || h <= ni) continue;
        if(nj < 0 || w <= nj) continue;
        if(C[ni][nj] == 0) continue;
        if(ni == pre.fi && nj == pre.se) continue;
        dfs(pii(ni,nj), pii(i,j), num);
    }
}

void solve(){
    C = vvi(h, vi(w));
    rep(i,h) rep(j,w) cin >> C[i][j];

    int cnt = 0;
    rep(i,h){
        rep(j,w){
            if(C[i][j] == 1)
                dfs(pii(i,j), pii(-1,-1), ++cnt);
        }
    }
    cout << cnt << endl;
}

int main(){
    ios_base::sync_with_stdio(0);
    // finput("./input");
    while(cin >> w >> h, w != 0 && h != 0){
        solve();
    }
    return 0;
}