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
}

Python: #!/usr/bin/env python
# -*- coding: utf-8 -*-

def dfs(s,Map,H,W,c):
    dxdy = [(1,0),(-1,0),(0,1),(0,-1),(1,1),(-1,-1),(-1,1),(1,-1)]
    for i in range(len(dxdy)):
        Map[s[0]][s[1]] = c
        nextPos = (s[0]+dxdy[i][0],s[1]+dxdy[i][1])
        if nextPos[0] >= 0 and nextPos[1] >= 0 and nextPos[0] < H and nextPos[1] < W:
            if Map[nextPos[0]][nextPos[1]] == 1:
                dfs(nextPos,Map,H,W,c)

while True:
    W,H = map(int,input().split(" "))
    if W == 0 and H == 0:
        break
    Map = [list(map(int,input().split())) for i in range(0,H)]
    c = 1
    for i in range(H):
        for j in range(W):
            if Map[i][j] == 1:
                c += 1
                dfs((i,j),Map,H,W,c)
    print(c-1)

Python: import sys
sys.setrecursionlimit(10000)
def f(x,y):
    if 0<=x<w and 0<=y<h and a[y][x]=='1':
        a[y][x]='0'
        for dx,dy in[[-1,0],[1,0],[0,-1],[0,1],[-1,-1],[1,-1],[-1,1],[1,1]]:f(x+dx,y+dy)
while 1:
    w,h=map(int,input().split())
    if w==0:break
    a=[input().split() for _ in[0]*h];b=0
    for i in range(w):
        for j in range(h):
            if a[j][i]=='1':
                b+=1;f(i,j)
    print(b)

Python: while(1):
 w,h = map(int,input().split())
 if((w == 0)and(h == 0)): break

 Map = []
 Map.append(['@']*(w+2))
 land = []
 for i in range(h):
  c = list('@'+input().replace(' ', '')+'@')
  Map.append(c)
  for j in range(w+2):
   if(c[j] == '1'): land.append([i+1,j])
 Map.append(['@']*(w+2))
 #print(land)

 #深さ優先探索
 def dfs(start_x,start_y):
  stack = []
  stack.append([start_x,start_y])
  
  while(1):      
   #stackが空になると終了
   if(stack == []): return
  
   #座標の取り出し
   cord = stack.pop()
   x,y = cord[0],cord[1]
  
   #行き止まりor海なら何もしない
   if((Map[x][y] == '0')or(Map[x][y] == '@')): continue
   #訪問済みなら何もしない
   elif(vis[x][y] == 1): continue
   else:
    vis[x][y] = 1 #訪問済みに

   #次行くところ
   vec_x = [0,0,1,-1,1,-1,1,-1]
   vec_y = [1,-1,0,0,1,-1,-1,1]
   for i in range(8):
     if(Map[x+vec_x[i]][y+vec_y[i]] == '1'):
       stack.append([x+vec_x[i],y+vec_y[i]])    
  
 ans = 0
 vis = [[0]*(w+2) for _ in range(h+2)]
 for i in range(len(land)):
  start_x,start_y = land[i][0],land[i][1]
  if(vis[start_x][start_y] == 0):
      dfs(start_x,start_y)
      ans += 1
      #print('aaa')
 print(ans)

Python: from collections import deque
QUE=deque()


while True:
    w,h=map(int,input().split())
    
    if w==h==0:
        break
    
    MAP=[list(map(int,input().split())) for i in range(h)]
    ANSLIST=[[0 for i in range(w)] for j in range(h)]

    NOW=1

    for i in range(h):
        for j in range(w):
            if MAP[i][j]==0:
                continue
            if ANSLIST[i][j]!=0:
                continue
            
            QUE.append((i,j))
            while QUE:
                i,j=QUE.pop()
                for x,y in [(i-1,j-1),(i-1,j),(i-1,j+1),(i,j-1),(i,j),(i,j+1),(i+1,j-1),(i+1,j),(i+1,j+1)]:
                    if 0<=x<h and 0<=y<w and MAP[x][y]==1 and ANSLIST[x][y]==0:
                        ANSLIST[x][y]=NOW
                        QUE.append((x,y))

            NOW+=1

    #for an in ANSLIST:
    #    print(an)

    print(NOW-1)

Python: import math
import copy
import sys
import fractions
# import numpy as np
# import statistics
import decimal
import heapq
import collections
import itertools
import bisect


# from operator import mul

sys.setrecursionlimit(100001)


# input = sys.stdin.readline
# sys.setrecursionlimit(10**6)

# ===FUNCTION===

def getInputIntList():
    outputDataList = []
    inputData = input().split()
    outputDataList = [int(n) for n in inputData]

    return outputDataList


def getSomeInputInt(n):
    outputDataList = []
    for i in range(n):
        inputData = int(input())
        outputDataList.append(inputData)

    return outputDataList


def getSomeInputListInt(n):
    inputDataList = []
    outputDataList = []
    for i in range(n):
        inputData = input().split()
        inputDataList = [int(n) for n in inputData]
        outputDataList.append(inputDataList)

    return outputDataList


# ===CODE===

def dfs(x, y):
    flg = False
    if data[x][y] == 0 or table[x][y] == 1:
        return False
    else:
        table[x][y] = 1
        flg = True


    for i in range(x - 1, x + 2):
        if i < 0 or i > h-1:
            continue
        for j in range(y - 1, y + 2):
            if j < 0 or j > w-1:
                continue
            if not(x == i and y == j):
                tmp = dfs(i, j)

    return flg


while True:
    w, h = map(int, input().split())
    if w == 0 and h == 0:
        break

    data = getSomeInputListInt(h)
    table = [[0 for _ in range(w)] for _ in range(h)]

    ans = 0
    for i in range(h):
        for j in range(w):
            if dfs(i, j):
                ans += 1

    print(ans)