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: import sys
input = sys.stdin.readline
sys.setrecursionlimit(10**7)

out = []
while True:
    W, H = map(int,input().split())
    if W == 0 and H == 0:
        break
    G = [list(map(int,input().split())) for _ in range(H)]
    visited = [[False]*W for _ in range(H)]
    ans = 0
    def dfs(h, w):
        visited[h][w] = True
        for dx in [-1, 0, 1]:
            for dy in [-1, 0, 1]:
                ww, hh = w+dx, h+dy
                if not 0 <= ww < W: continue
                if not 0 <= hh < H: continue
                if G[hh][ww] == 0 or visited[hh][ww]: continue
                dfs(hh, ww)
    for h in range(H):
        for w in range(W):
            if G[h][w] == 0 or visited[h][w]: continue
            ans += 1
            dfs(h, w)
    out.append(ans)
print(*out, sep="\n")

Python: #!/usr/bin/env python3
# -*- coding: utf-8 -*-

import array
import itertools
import sys


class RecursiveDepthFirstSearch(object):

    def __init__(self, width, height, stage):
        self.width = width
        self.height = height
        self.stage = stage

    def search(self, x0, y0):
        if x0 < 0 or self.width <= x0 or y0 < 0 or self.height <= y0:
            pass
        elif self.stage[x0][y0] == 0:
            pass
        else:
            self.stage[x0][y0] = 0
            for dx, dy in itertools.product(range(-1, 2), range(-1, 2)):
                if dx != 0 or dy != 0:
                    self.search(x0 + dx, y0 + dy)


if __name__ == "__main__":
    sys.setrecursionlimit(10000)
    while True:
        w, h = map(int, input().split())
        if w == 0 and h == 0:
            break
        else:
            stage = [array.array("B", x) for x in zip(
                *[list(map(int, input().split())) for y in range(h)])]
            dfs = RecursiveDepthFirstSearch(w, h, stage)
            answer = 0
            for x, y in itertools.product(range(w), range(h)):
                if dfs.stage[x][y] == 1:
                    dfs.search(x, y)
                    answer += 1
            print(answer)

Python: import sys
sys.setrecursionlimit(5000)

c_list = []


def dps(h_i, w_i, h, w, done_list):
    if h_i >= h or w_i >= w or h_i < 0 or w_i < 0:
        return
    if c_list[h_i][w_i] == 1 and done_list[h_i][w_i] == False:
        done_list[h_i][w_i] = True
        for d_h in [-1,0,1]:
            for d_w in [-1, 0, 1]:
                if d_h == 0 and d_w == 0: continue
                n_h, n_w = h_i + d_h, w_i + d_w
                if n_h >= h or n_w >= w or n_h < 0 or n_w < 0: continue

                dps(h_i-1, w_i, h, w, done_list)
                dps(h_i+1, w_i, h, w, done_list)

                dps(h_i, w_i-1, h, w, done_list)
                dps(h_i, w_i+1, h, w, done_list)

                dps(h_i-1, w_i-1, h, w, done_list)
                dps(h_i-1, w_i+1, h, w, done_list)

                dps(h_i+1, w_i-1, h, w, done_list)
                dps(h_i+1, w_i+1, h, w, done_list)

        
def main():
    global c_list
    c_list = []
    w,h = map(int, input().split())
    if w == 0 and h == 0:
        return False

    for i in range(h):
        c_list.append(list(map(int,input().split())))

    done_list = [[False for _ in range(w)] for _i in range(h)]
    cnt = 0
    for h_i in range(h):
        for w_i in range(w):
            if not done_list[h_i][w_i] and c_list[h_i][w_i] == 1:
                dps(h_i, w_i, h, w, done_list)
                cnt += 1
    return cnt

if __name__ == "__main__":
    rl = []
    while True:
        res = main()
        if res is False: break
        else:
            rl.append(res)
    for r in rl:
        print(r)

Python: 
#150 島は幾つある？
h,w=1,1

count=0
anser=0

def search(x,y):
    #マップの外側か壁の場合は何もしない
    #print(x,y)

    global count
    count+=1
    if x<0 or x>w-1 or y<0 or y>h-1 or map_data[y][x]==0:
 
        return
        
    
    #以前に到達していたら何もしない
    if reached[y][x] ==0:
         return

    reached[y][x]=0
    
    #print("aa")



    search(x+1,y)#右
    search(x-1,y)#左
    search(x,y+1)#上
    search(x,y-1)#下
    search(x-1,y-1)
    search(x-1,y+1)
    search(x+1,y-1)
    search(x+1,y+1)



while h!=0 and w!=0: 
    anser=0
    count=1
    #グラフの入力方法------

    w,h=map(int ,raw_input().split())
    if h==0 and w==0:
        break

    map_data = [[0]*w for _ in range(h)]
    reached = [[1]*w for _ in range(h)]

    for i in range(h):
        ct = raw_input().split()
       
        for j in range(w):
            map_data[i][j] = int(ct[j])
            reached [i][j]=int(ct[j])
            if ct[j]==1:
                sx=j
                sy=i

    t=0
    a=0
    while a<=h:
       if 1 in reached[t%h]:         
            search(reached[t%h].index(1),t%h)
            anser+=1
            #print("count",count)
            count=1
            a=0
       elif count==h:
                break
       t+=1
       a+=1

    print(anser)

Python: import sys

sys.setswitchinterval(10**8)


next_s = ((-1, 1), (0, 1), (1, 1),
          (-1, 0), (1, 0),
          (-1, -1), (0, -1), (1, -1))


def DFS(x, y):
    if not (0 <= x < W and 0 <= y < H):
        return
    if not map_[y * W + x]:
        return

    map_[y * W + x] = 0

    for dx, dy in next_s:
        DFS(x + dx, y + dy)


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

    map_ = []
    for h in range(H):
        map_ += list(map(int, input().split()))
    island_num = 0
    while any(map_):
        next_idx = map_.index(1)
        x = next_idx % W
        y = next_idx // W
        DFS(x, y)
        island_num += 1

    print(island_num)