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<bits/stdc++.h>
using namespace std;

int w,h,C[100][100];
int diff[8][2]={{-1,-1},{-1,0},{-1,1},{0,-1},{0,1},{1,-1},{1,0},{1,1}};

void dfs(int x,int y){
    int i;
    C[x][y]=0;
    for(i=0;i<8;i++){
        if(x+diff[i][0]>=0 && x+diff[i][0]<h && y+diff[i][1]>=0 && y+diff[i][1]<w){
            if(C[x+diff[i][0]][y+diff[i][1]]==1){
                dfs(x+diff[i][0],y+diff[i][1]);
            }
        }
    }
}

int main(){
    int i,j,ans;
    while(cin>>w>>h,w!=0||h!=0){
        ans=0;
        for(i=0;i<h;i++)for(j=0;j<w;j++)cin>>C[i][j];
        for(i=0;i<h;i++){
            for(j=0;j<w;j++){
                if(C[i][j]==1){
                    dfs(i,j);
                    ans++;
                }
            }
        }
        cout<<ans<<endl;
    }
}

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

using namespace std;

int main()
{
    int w, h;
    while (cin >> w >> h, w | h) {
        vector<vector<int> > map(h, vector<int>(w));
        for (int i = 0; i < h; ++i) {
            for (int j = 0; j < w; ++j) {
                cin >> map[i][j];
            }
        }

        // bfs
        int islandCount = 0;
        for (int i = 0; i < h; ++i) {
            for (int j = 0; j < w; ++j) {
                queue<pair<int, int> > que;
                if (map[i][j] != 1) {
                    continue;
                }
                ++islandCount;
                que.push({i, j});
                while (!que.empty()) {
                    pair<int, int> p = que.front(); que.pop();
                    if (map[p.first][p.second] == -1) {
                        continue;
                    }
                    map[p.first][p.second] = -1;
                    for (int k = -1; k < 2; ++k) {
                        for (int l = -1; l < 2; ++l) {
                            if ((k | l) == 0) {
                                continue;
                            }
                            int ny = p.first + k;
                            int nx = p.second + l;
                            if (0 <= nx && nx < w &&
                                    0 <= ny && ny < h) {
                                if (map[ny][nx] == 1) {
                                    que.push({ny, nx});
                                }
                            }
                        }
                    }
                }
            }
        }
        cout << islandCount << endl;
    }

    return 0;
}

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

using namespace std;

bool check(bool[50][50],pair<int,int>);
void rmv(bool[50][50],int,int);

int main(void){
	for(int w,h;cin>> w >> h,w||h;){
		bool fld[50][50]={0};
		int n;

		for(int i=0;i<h;i++)
			for(int j=0;j<w;j++)
				cin >> fld[i][j];

		for(n=0;check(fld,make_pair(w,h));n++);
		cout << n << endl;
	}
	return 0;
}

bool check(bool fld[50][50],pair<int,int> wide){
	for(int i=0;i<wide.second;i++)
		for(int j=0;j<wide.first;j++)
			if(fld[i][j]){
				rmv(fld,i,j);
				return true;
			}

	return false;
}

void rmv(bool fld[50][50],int y,int x){
	if(x>=0&&y>=0&&x<=50&&y<=50)
		if(fld[y][x]){
			fld[y][x]=false;
			for(int i=-1;i<=1;i++)
				for(int j=-1;j<=1;j++)
					rmv(fld,y+i,x+j);
		}
}

C++: #include<iostream>
#include<vector>
#include<stdio.h>
using namespace std;
#define DUMP(x)  cerr << #x << " = " << (x) << endl;
#define DEBUG(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;

vector<vector<int> > map;
vector<vector<bool> > reach;
int w,h;

void dfs(int i, int j){
    if((reach[i][j]) or (map[i][j]==0))
        return;
    reach[i][j] = true;
    if(0<i && 0<j) dfs(i-1,j-1);
    if(0<i) dfs(i-1,j);
    if(0<i && j<w-1) dfs(i-1,j+1);
    if(0<j) dfs(i, j-1);
    if(j<w-1) dfs(i, j+1);
    if(i<h-1 && 0<j) dfs(i+1,j-1);
    if(i<h-1) dfs(i+1,j);
    if(i<h-1 && j<w-1) dfs(i+1,j+1);
}

int main(){

    while((cin >> w >> h) && (w>0 && h>0)){
        int res=0;
        for (int i = 0; i < h; i++) {
            vector<int> temp(w,0);
            for (int j = 0; j < w; j++)
                cin >> temp[j];
            map.push_back(temp);
        }
        for (int i = 0; i < h; i++){
            vector<bool> temp(w,false);
            reach.push_back(temp);
        }
        for (int i = 0; i < h; i++) {
            for (int j = 0; j < w; j++) {
                if(map[i][j]==1 && !reach[i][j]){
                    res++;
                    dfs(i,j);
                }
            }
        }
        cout << res << endl;
        map.clear();
        reach.clear();

    }
    return 0;
}