#include<iostream>
#include<iomanip>
#include<math.h>
#include<vector>
#include<algorithm>
#include<set>
#include<map>
#include<unordered_map>
#include<queue>
#include<stack>
#include<string>
#include<bitset>
#include<random>
#include<time.h>
#define MOD 1000000007ll
#define INF 1000000000ll
#define EPS 1e-7
#define REP(i,m) for(long long i=0; i<(ll)m; i++)
#define FOR(i,n,m) for(long long i=n; i<(ll)m; i++)
#define DUMP(a) for(long long dump=0; dump<(ll)a.size(); dump++) { cout<<a[dump]; if(dump!=(ll)a.size()-1) cout<<" "; else cout<<endl; }
#define ALL(v) v.begin(),v.end()
#define UNIQUE(v) sort(v.begin(),v.end()); v.erase(unique(v.begin(),v.end()),v.end());
#define pb push_back
using namespace std;
typedef long long ll;
typedef pair<ll, ll> P;
typedef long double ld;

ll h,w;
vector<vector<int>> a(3000,vector<int>(3000));
ll dx[]={1,0,-1,0};
ll dy[]={0,1,0,-1};

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	cin>>h>>w;
	REP(i,h) REP(j,w) {
		ll hoge;
		cin>>hoge;
		a[i][j]=hoge;
	}
	ll sum=0;
	REP(i,h) REP(j,w) {
		if(a[i][j]) {
			bool d=true;
			a[i][j]=-1;
			REP(k,4) {
				ll nx=i+dx[k];
				ll ny=j+dy[k];
				if(nx>=0&&nx<h&&ny>=0&&ny<w&&a[nx][ny]==-1) d=false;
			}
			if(d) {
				sum++;
			}
		}
	}
	cout<<sum<<endl;
}