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>
using namespace std;

int main()
{
	while (true)
	{
		int w, h;
		int num = 0;
		cin >> w >> h;
		if (w == 0 && h == 0)break;

		int **c;
		c = new int*[h + 2];
		for (int i = 0; i < h + 2; i++)	c[i] = new int[w + 2]; 
		for (int i = 0; i < h + 2; i++)				  
		{
			for (int l = 0; l < w + 2; l++)	c[i][l] = 0;
		}

		for (int i = 1; i < h + 1; i++)
		{
			for (int l = 1; l < w + 1; l++)	cin >> (c[i])[l];
		}
		for (int i = 1; i < h + 1; i++)
		{
			for (int l = 1; l < w + 1; l++)
			{
				if (c[i][l] == 1)		     
				{
					if (c[i + 1][l - 1] == 0 && c[i + 1][l] == 0 && c[i + 1][l + 1] == 0 && c[i][l + 1] == 0)
					{
						num++; 
					}

					else if ((c[i + 1][l - 1] == 1 && c[i + 1][l] == 0) && (c[i + 1][l + 1] == 1 || c[i][l + 1] == 1))	   
					{
						c[i][l] = 0;
						c[i + 1][l] = 1; 
					}
					else
					{
						c[i][l] = 0; 
					}

				}
			}
		}
		cout << num << endl;
	}
	return 0;
}

C++: #include <iostream>
#include <cstdio>
#include <queue>
#include <cstring>

using namespace std;

typedef pair<int, int> p;

int t_x[] = {1, 1, 1, 0, -1, -1, -1, 0};
int t_y[] = {1, 0, -1, -1, -1, 0, 1, 1};

int field[52][52];  

int main()
{
  while (true) {
    memset(field, 0, sizeof field);
    int width, height;
    scanf("%d %d", &width, &height);
    
    if (width == 0 && height == 0) break;
    
    for (int i = 1; i <= height; i++) {
      for (int j = 1; j <= width; j++) {
	scanf(" %d", &field[i][j]);
      }
    }
    
    queue<p> que;
    int c = 0;

    for (int i = 1; i <= height; i++) {
      for (int j = 1; j <= width; j++) {
	if (field[i][j] == 1) {
	  c++;
	  que.push(p(i, j));
	  field[i][j] = 0;
	  while (!que.empty()) {
	    p tmp = que.front();
	    que.pop();
	    //field[tmp.second][tmp.first] = 0;
	    //cout << tmp.first << ", " << tmp.second << endl;
	    for (int k = 0; k < 8; k++) {
	      int tx = tmp.second + t_x[k];
	      int ty = tmp.first + t_y[k];
	      //cout << ty << ", "<< tx << " =  "<< field[ty][tx] << endl;
	      if (field[ty][tx] == 1) {
		field[ty][tx] = 0;
		que.push(p(ty, tx));
	      }
	    }
	    //cout << endl;
	    //cout << i << " " << j << endl;
	    for (int k = 1; k <= height; k++) {
	      for (int l = 1; l <= width; l++) {
		//cout << field[k][l] << " ";
	      }
	      //cout << endl;
	    }
	    //cout << endl;
	  }
	}
      }     
    }
    cout << c << endl;
  }
  return 0;
}

C++: #include <bits/stdc++.h>
#include <math.h>
using namespace std;
int W,H;
char field[60][60];
int dx[8]{-1,0,1,-1,1,-1,0,1};
int dy[8]{1,1,1,0,0,-1,-1,-1};

void dfs(int x,int y){
    field[x][y] = '0';
    for(int i = 0;i < 8;i++){
        int nx = x + dy[i];
        int ny = y + dx[i];
        if(0 <= nx && nx < H && 0 <= ny && ny < W && field[nx][ny] == '1'){
            dfs(nx,ny);
        }
    }
    return;
}
int main(){
    for(int k = 0;1;k++){
    cin >> W >> H;
    if(H == 0 && W == 0){
        return 0;
    }
    for(int i = 0;i < H;i++){
        for(int j = 0;j < W;j++){
            cin >> field[i][j];
        }
    }
    int ans = 0;
    bool frag = 0;
    for(int i = 0;i < H;i++){
        for(int j = 0;j < W;j++){
            if(field[i][j] == '1'){
                ans++;
                dfs(i,j);
            }
        }
    }
    cout << ans  << endl;
    }
}

C++: #include "bits/stdc++.h"
using namespace std;
typedef long long ll;
// #define int long long

template <class T>
bool INRANGE(T x, T a, T b) { return a <= x && x <= b; }
template <class T>
inline bool chmin(T &a, T b)
{
    if (a > b)
    {
        a = b;
        return true;
    }
    return false;
}
template <class T>
inline bool chmax(T &a, T b)
{
    if (a < b)
    {
        a = b;
        return true;
    }
    return false;
}

#define REP(i, n) for (int i = 0; i < (n); ++i)
#define RREP(i, n) for (int i = (n); i >= 0; --i)
#define FOR(i, a, b) for (int i = (a); i < (b); ++i)
#define RFOR(i, a, b) for (int i = (a); i >= (b); --i)
#define ALL(v) (v).begin(), (v).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" \
                      << " " << __FILE__ << endl;

typedef vector<int> vi;
typedef vector<string> vs;
typedef vector<vi> vvi;
typedef pair<int, int> pii;

int dh[] = {-1, -1, -1, 0, 0, 1, 1, 1};
int dw[] = {-1, 0, 1, -1, 1, -1, 0, 1};

vvi m;
int cnt;
vector<vector<bool>> visited;

void next(int h, int w) {
    if (m[h][w] == 0) return;
    if (visited[h][w]) return;
    visited[h][w] = true;

    REP(i, 8) {
        int nh = h + dh[i];
        int nw = w + dw[i];
        if (!INRANGE(nh, 0, (int)m.size()-1)) continue;
        if (!INRANGE(nw, 0, (int)m[0].size()-1)) continue;
        next(nh, nw);
    }
}

void dfs(int h, int w) {
    if (m[h][w] == 0) return;
    if (visited[h][w]) return;
    visited[h][w] = true;

    cnt++;
    REP(i, 8) {
        int nh = h + dh[i];
        int nw = w + dw[i];
        if (!INRANGE(nh, 0, (int)m.size()-1)) continue;
        if (!INRANGE(nw, 0, (int)m[0].size()-1)) continue;
        next(nh, nw);
    }
}

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

    while (true)
    {
        int w, h;
        cin >> w >> h;
        if (w == 0 and h == 0) break;

        m = vvi();
        REP(_, h) {
            vi l(w);
            //cin >> l;
            REP(i, w) cin >> l[i];
            m.emplace_back(l);
        }

        visited = vector<vector<bool>>(h, vector<bool>(w, false));
        cnt = 0;
        REP(hi, h) {
            REP(wi, w) {
                dfs(hi, wi);
            }
        }

        cout << cnt << endl;
    }
    
    


    return 0;
}