#include "rect.h"
#include<bits/stdc++.h>
using namespace std;
#define sz(x) (int)x.size()
#define REP(i,n) for(int i=0;i<n;i++)
#define REP1(i,n) for(int i=1;i<=n;i++)
#define pb push_back
#define lowb(x) (x&(-x))
#define ALL(x) x.begin(),x.end()
#define pii pair<int,int>
#define f first
#define s second
#define SORT_UNIQUE(x) sort(ALL(x)),x.erase(unique(ALL(x)),x.end())
const int maxn=3e3+5;
#define ll long long
pii rng[maxn];
int par[maxn];
int find(int u){
if(par[u]==u) return u;
return par[u]=find(par[u]);
}
void merge(int a,int b){
a=find(a),b=find(b);
if(a==b) return;
rng[b]={min(rng[a].f,rng[b].f),max(rng[a].s,rng[b].s)};
par[a]=b;
}
long long count_rectangles(std::vector<std::vector<int> > a) {
int n=sz(a),m=sz(a[0]);
map<pii,vector<int>> mp;
REP1(i,n-2){
vector<pii> v;
REP(i,m) rng[i]={i,i},par[i]=i;
REP(j,m){
v.pb({a[i][j],j});
}
sort(ALL(v));
vector<pii> vv;
for(int j=0;j<m;){
int p=j;
vector<int> ps;
while(j<m and v[p].f==v[j].f){
int z=v[j].s;
if(z) merge(z-1,z);
if(z+1<m) merge(z,z+1);
ps.pb(z);
++j;
}
for(int x:ps){
vv.pb(rng[find(x)]);
}
}
SORT_UNIQUE(vv);
for(auto x:vv) mp[x].pb(i);
return sz(vv);
}
return 0;
}
