#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
#define FOR(i,a) for (int i=0;i<(a);++i)
#define FORD(i,a) for (int i=(a)-1;i>=0;i--)
#define FORT(i,a,b) for (int i=(a);i<=(b);++i)
#define FORTD(i,b,a) for (int i=(b);i>=(a);--i)
#define trav(i,v) for (auto i : v)
#define all(v) v.begin(),v.end()
#define ad push_back
#define fr first
#define sc second
#define mpr(a,b) make_pair(a,b)
#define pir pair<int,int>
#define all(v) v.begin(),v.end()
#define make_unique(v) v.erase(unique(all(v)),v.end())
#define fastio ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define srng mt19937 rng(chrono::steady_clock::now().time_since_epoch().count())
#define y1 EsiHancagorcRepa
const int N=5e6+10;
const ll MOD2=998244353;
const ll MOD=1e9+7;
int par[N],sz[N];
ll qan;
void make(int v){
par[v]=v;
sz[v]=1;
qan++;
}
int get(int v){
if (par[v]==v)return v;
return par[v]=get(par[v]);
}
void unite(int a,int b){
a=get(a);
b=get(b);
if (a!=b){
if (sz[a]<sz[b])swap(a,b);
par[b]=a;
sz[a]+=sz[b];
qan--;
}
}
string c[N];
ll ans=0;
int main(){
fastio;
srng;
#ifdef ALEXPC
freopen("input.txt","r",stdin);
freopen("output.txt","w",stdout);
#endif
int n,m;
cin>>n>>m;
FOR(i,n){
cin>>c[i];
}
FOR(sk,n){
qan=0;
FORT(i,sk,n-1){
//cout<<1<<endl;
FOR(j,m){
//cout<<2<<endl;
if (c[i][j]=='1'){
make(i*m+j);
//cout<<sk<<" "<<i<<" "<<j<<" "<<qan<<endl;
if (i!=sk && c[i-1][j]=='1')unite(i*m+j,(i-1)*m+j);
//cout<<sk<<" "<<i<<" "<<j<<" "<<qan<<endl;
if (j!=0 && c[i][j-1]=='1')unite(i*m+j,i*m+j-1);
//cout<<sk<<" "<<i<<" "<<j<<" "<<qan<<endl;
}
//cout<<qan<<endl;
}
//cout<<sk<<" "<<i<<" "<<qan<<endl;
ans+=qan;
}
}
cout<<ans<<endl;
return 0;
}
