#include "rect.h"
#include <bits/stdc++.h>
using namespace std;
long long count_rectangles(vector<vector<int>> a){
int n = a.size();
int m = a[0].size();
long long ans = 0;
vector visited = a;
for(int i=0;i<n;i++) {
for(int j=0;j<m;j++) {
if(visited[i][j])continue;
int minx = n;
int maxx = 0;
int miny = m;
int maxy = 0;
int area = 0;
function<void(int,int)> dfs = [&](int x,int y) {
if(visited[x][y])return;
visited[x][y]=true;
area++;
minx=min(minx,x);
maxx=max(maxx,x);
miny=min(miny,y);
maxy=max(maxy,y);
if(x!=0)dfs(x-1,y);
if(y!=0)dfs(x,y-1);
if(x!=n-1)dfs(x+1,y);
if(y!=m-1)dfs(x,y+1);
};
dfs(i,j);
if(minx==0)continue;
if(miny==0)continue;
if(maxx==n-1)continue;
if(maxy==m-1)continue;
if((maxx-minx+1)*(maxy-miny+1)==area)ans++;
}
}
return ans;
}
