#include "bits/stdc++.h" using namespace std; char a[1005][1005]; int s=0; void dfs(int x,int y){ a[x][y]='0'; if(a[x+1][y]>'0')dfs(x+1,y); if(a[x-1][y]>'0')dfs(x-1,y); if(a[x][y+1]>'0')dfs(x,y+1); if(a[x][y-1]>'0')dfs(x,y-1); } int main(){ int n,m; cin>>n>>m; for(int i=1;i<=n;i++){ for(int j=1;j<=m;j++){ cin>>a[i][j]; } } for(int i=1;i<=n;i++){ for(int j=1;j<=m;j++){ if(a[i][j]>'0'){ s++; dfs(i,j); } } } cout<<s; }