Go: package main

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

func getScanner(fp *os.File) *bufio.Scanner {
	scanner := bufio.NewScanner(fp)
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 1000005), 1000005)
	return scanner
}

func getNextString(scanner *bufio.Scanner) string {
	scanner.Scan()
	return scanner.Text()
}

func getNextInt(scanner *bufio.Scanner) int {
	i, _ := strconv.Atoi(getNextString(scanner))
	return i
}

func getNextInt64(scanner *bufio.Scanner) int64 {
	i, _ := strconv.ParseInt(getNextString(scanner), 10, 64)
	return i
}

func getNextUint64(scanner *bufio.Scanner) uint64 {
	i, _ := strconv.ParseUint(getNextString(scanner), 10, 64)
	return i
}

func getNextFloat64(scanner *bufio.Scanner) float64 {
	i, _ := strconv.ParseFloat(getNextString(scanner), 64)
	return i
}

func main() {
	fp := os.Stdin
	wfp := os.Stdout
	cnt := 0

	if os.Getenv("MASPY") == "ますピ" {
		fp, _ = os.Open(os.Getenv("BEET_THE_HARMONY_OF_PERFECT"))
		cnt = 0
	}
	if os.Getenv("MASPYPY") == "ますピッピ" {
		wfp, _ = os.Create(os.Getenv("NGTKANA_IS_GENIUS10"))
	}

	scanner := getScanner(fp)
	writer := bufio.NewWriter(wfp)
	for solve(scanner, writer) {

	}
	for i := 0; i < cnt; i++ {
		fmt.Fprintln(writer, "-----------------------------------")
		solve(scanner, writer)
	}
	writer.Flush()
}

func solve(scanner *bufio.Scanner, writer *bufio.Writer) bool {
	sol := solver{}
	sol.w = getNextInt(scanner)
	sol.h = getNextInt(scanner)
	if sol.w == 0 && sol.h == 0 {
		return false
	}
	sol.land = makeInts(sol.h, sol.w)
	for y := 0; y < sol.h; y++ {
		for x := 0; x < sol.w; x++ {
			sol.land[y][x] = getNextInt(scanner)
		}
	}
	ans := 0
	for y := 0; y < sol.h; y++ {
		for x := 0; x < sol.w; x++ {
			if sol.land[y][x] == 0 {
				continue
			}
			ans++
			sol.dfs(y, x)
		}
	}
	fmt.Fprintln(writer, ans)
	return true
}

type solver struct {
	w, h int
	land [][]int
}

func (sol *solver) dfs(y, x int) {
	if y < 0 {
		return
	}
	if y >= sol.h {
		return
	}
	if x < 0 {
		return
	}
	if x >= sol.w {
		return
	}
	if sol.land[y][x] == 0 {
		return
	}
	sol.land[y][x] = 0
	dy := [8]int{-1, -1, -1, 0, 0, 1, 1, 1}
	dx := [8]int{-1, 0, 1, -1, 1, -1, 0, 1}
	for i := 0; i < 8; i++ {
		sol.dfs(y+dy[i], x+dx[i])
	}
}
func makeInts(h, w int) [][]int {
	index := make([][]int, h, h)
	data := make([]int, h*w, h*w)
	for i := 0; i < h; i++ {
		index[i] = data[i*w : (i+1)*w]
	}
	return index
}

C++: #include<stdio.h>
#include<string.h>

int main(){
	int zu[52][52],w,h,i,j,flag,land;
	
	while(0<=scanf("%d%d",&h,&w)){
		if(w==0&&h==0)break;
		
		memset(zu,0,sizeof(zu));
		
		for(i=1;i<=w;i++){
			for(j=1;j<=h;j++){
				scanf("%d",&zu[i][j]);
			}
		}
		
		flag=1;
		land=1;
		while(flag!=0){
			++land;
			flag=0;
			for(i=1;i<=w;i++){
				for(j=1;j<=h;j++){
					if(zu[i][j]==1){
						zu[i][j]=land;
						flag=1;
						break;
					}
				}
				if(flag==1)break;
			}
			
			while(flag==1){
				flag=2;
				for(i=1;i<=w;i++){
					for(j=1;j<=h;j++){
						if(zu[i][j]!=1)continue;
						if(zu[i+1][j]==land || zu[i-1][j]==land || zu[i][j+1]==land || zu[i][j-1]==land ||
							zu[i+1][j+1]==land|| zu[i+1][j-1]==land||zu[i-1][j+1]==land||zu[i-1][j-1]==land){
							zu[i][j]=land;
							flag=1;
						}
					}
				}
			}
		}
		for(i=1;i<=w;i++){
			for(j=1;j<=h;j++){
//				printf("%d ",zu[i][j]);
			}
//			printf("\n");
		}
		
		
		printf("%d\n",land-2);
	}
	return 0;
}

C++: #include <iostream>
#include <stdio.h>
#include <algorithm>
#include <math.h>
#include <vector>
#include <string>
#include <sstream>
#include <numeric>
#include <set>
#include <map>

#define rep(i, j) for(int i = 0; i < j; i++)
#define all(i) i.begin(), i.end()
#define ll long long
#define bl bool
#define nn printf("\n");
#define mod 1000000007

using namespace std;

int w, h, cnt = 0;

void srch(int x, int y, vector<vector<int>> &inp, vector < vector <bool>> &hit)
{
	if (x < 0 || w <= x || y < 0 || h <= y || inp[y][x] == 0) { return; }
	if (hit[y][x]) return;
	hit[y][x] = true;
	cnt += 1;
	srch(x + 1, y, inp, hit);
	srch(x - 1, y, inp, hit);
	srch(x, y + 1, inp, hit);
	srch(x, y - 1, inp, hit);
	srch(x + 1, y + 1, inp, hit);
	srch(x + 1, y - 1, inp, hit);
	srch(x - 1, y + 1, inp, hit);
	srch(x - 1, y - 1, inp, hit);
}
int main()
{
	cin.tie(0);
	ios::sync_with_stdio(false);
	while (cin >> w >> h && w != 0 && h != 0)
	{
		vector<vector<int>> inp(h, vector<int>(w, 0));
		vector<vector<bool>> hit(h, vector<bool>(w, false));
		int ans = 0;
		rep(y, h) rep(x, w){ cin >> inp[y][x]; }
		rep(y, h) rep(x, w)
		{
			srch(x, y, inp, hit);
			if (cnt > 0) { ans += 1; }
			cnt = 0;
		}
		printf("%d\n", ans);
	}

	return 0;
}

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

#define REP(i,n) for(int i=0;i<(n);i++)
#define ALL(v) (v).begin(),(v).end()
#define pb push_back
typedef long long ll;
typedef pair<int,int> P;

template<typename A,typename B> inline void chmin(A &a,B b){if(a>b) a=b;}
template<typename A,typename B> inline void chmax(A &a,B b){if(a<b) a=b;}

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

//-----------------------------------------------------------------------

int w,h;
int M[55][55];

void dfs(int y,int x)
{
    M[y][x]=0;
    REP(i,8){
        int ny=y+dy[i],nx=x+dx[i];
        if(0<=ny && ny<h && 0<=nx && nx<w && M[ny][nx]) dfs(ny,nx);
    }
}   

int main()
{   
    cin.tie(0);
    ios::sync_with_stdio(false);

    while(cin>>w>>h,w|h)
    {
        REP(i,h) REP(j,w) cin>>M[i][j];

        int cnt=0;
        REP(i,h) REP(j,w){
            if(M[i][j]){
                cnt++;
                dfs(i,j);
            }
        }
        cout<<cnt<<endl;
    }
}

C++: #include<iostream>
#include<cmath>
#include<vector>
#include<string>
typedef unsigned long long ull;
#define rep(i,a) for(int i=0;i<a;i++)
#define loop(i,a,b) for(int i=a;i<b;i++)
using namespace std;
const double eps = 1e-10;
const double pi = acos(-1);
const double inf = (int)1e8;

char maze[50][50];
int H,W;

int dfs(int x,int y){
  if(x<0 || H<=x || y<0 || W<=y)return 0;
  int cnt = 0;
  maze[x][y] = '0';
  int dx[] = { 1, 1, 1,-1,-1,-1, 0, 0};
  int dy[] = {-1, 0, 1,-1, 0, 1, 1,-1};
  rep(i,8){
    // if(i==j&&i==0)continue;
    if(maze[x+dx[i]][y+dy[i]]=='1')dfs(x+dx[i],y+dy[i]);
  }
  return cnt;
}
void solve(){
  int h,w;
  while(cin>>W>>H,H+W){
    rep(i,H)rep(j,W)cin>>maze[i][j];
    int res=0;
    rep(i,H)rep(j,W){
      //rep(k,H){rep(l,W)cout<<maze[k][l];cout<<endl;}
      //cout<<endl;
      if(maze[i][j]=='1'){
	dfs(i,j);
	res++;
      }
    }
    cout<<res<<endl;
  }
}

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