#include <algorithm>
#include <complex>
#include <cstdlib>
#include <ctime>
#include <iomanip>
#include <iostream>
#include <map>
#include <math.h>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>

using namespace std;
#define SAY_YES cout << "YES" << endl;
#define SAY_Yes cout << "Yes" << endl;
#define SAY_NO cout << "NO" << endl;
#define SAY_No cout << "No" << endl;
#define IFYES(TRUE_OR_FALSE)   \
    if (TRUE_OR_FALSE)         \
    {                          \
        cout << "YES" << endl; \
    }                          \
    else                       \
    {                          \
        cout << "NO" << endl;  \
    }
#define IFYes(TRUE_OR_FALSE)   \
    if (TRUE_OR_FALSE)         \
    {                          \
        cout << "Yes" << endl; \
    }                          \
    else                       \
    {                          \
        cout << "No" << endl;  \
    }
#define IFyes(TRUE_OR_FALSE)   \
    if (TRUE_OR_FALSE)         \
    {                          \
        cout << "yes" << endl; \
    }                          \
    else                       \
    {                          \
        cout << "no" << endl;  \
    }
#define DEBUG_OUTPUT_ARRAY(XXX, ONE)                            \
    for (int i = 0; i < (ONE); i++)                             \
    {                                                           \
        cout << "DEBUG: i = " << i << " -> " << XXX[i] << endl; \
    }
#define DEBUG_OUTPUT_ARRAY2(XXX, ONE, TWO)                             \
    for (int i = 0; i < (ONE); i++)                                    \
    {                                                                  \
        cout << "<<< i = " << i << " >>>" << endl;                     \
        for (int j = 0; j < (TWO); j++)                                \
        {                                                              \
            cout << "DEBUG: j = " << j << " -> " << XXX[i][j] << endl; \
        }                                                              \
    }
#define DEBUG_OUTPUT_ARRAY2_BOX(XXX, ONE, TWO) \
    for (int i = 0; i < (ONE); i++)            \
    {                                          \
        cout << i << "  ";                     \
        for (int j = 0; j < (TWO); j++)        \
        {                                      \
            cout << XXX[i][j] << " ";          \
        }                                      \
        cout << endl;                          \
    }

typedef pair<long long int, long long int> pll;


const long long int mod = 1000000007;
const long long int INF = 99999999999999999;

long long int w,h,ch[100][100];

void dfs(long long int hhh,long long int www){
	ch[hhh][www]=0;
	if(ch[hhh][www+1]==1){dfs(hhh,www+1);}
	if(ch[hhh][www-1]==1){dfs(hhh,www-1);}
	if(ch[hhh+1][www]==1){dfs(hhh+1,www);}
	if(ch[hhh-1][www]==1){dfs(hhh-1,www);}
	
	if(ch[hhh+1][www+1]==1){dfs(hhh+1,www+1);}
	if(ch[hhh-1][www-1]==1){dfs(hhh-1,www-1);}
	if(ch[hhh+1][www-1]==1){dfs(hhh+1,www-1);}
	if(ch[hhh-1][www+1]==1){dfs(hhh-1,www+1);}
}

int main()
{
    cout << fixed << setprecision(18);
	cin>>w>>h;
	while(w!=0&&h!=0){
		long long int res=0;
		for(int i=1;i<=h;i++){
			for(int j=1;j<=w;j++){
				cin>>ch[i][j];
			}
		}
		for(int i=0;i<=h;i++){
			ch[i][0]=0;
			ch[i][w+1]=0;
		}
		for(int i=0;i<=w;i++){
			ch[0][i]=0;
			ch[h+1][i]=0;
		}
		for(int i=1;i<=h;i++){
			for(int j=1;j<=w;j++){
				if(ch[i][j]==1){
					res++;
					dfs(i,j);
				}
			}
		}
		cout<<res<<endl;
		cin>>w>>h;

	}
}




Measured memory_bytes: 3180