#include "rect.h"
#include <bits/stdc++.h>
using namespace std;
struct segment{
vector<int> tr;
int sz;
segment(vector<int> &v){
sz = 1;
while(sz < v.size()) sz *= 2;
tr.resize(2*sz);
for(int i=0; i<v.size(); i++) tr[i+sz] = v[i];
for(int i=sz; --i;) tr[i] = max(tr[2*i], tr[2*i+1]);
}
segment() {}
int query(int l, int r){
int ans = 0;
for(l+=sz, r+=sz; l<r; l>>=1, r>>=1){
if(l & 1) ans = max(ans, tr[l++]);
if(r & 1) ans = max(ans, tr[--r]);
}
return ans;
}
};
struct segment2d{
vector<segment> tr;
int sz;
segment2d(vector<vector<int>> &v){
sz = 1;
while(sz < v.size()) sz *= 2;
tr.resize(2*sz);
int sz2 = v[0].size();
vector<int> ilvuoto(sz2);
for(int i=0; i<v.size(); i++) tr[i+sz] = segment(v[i]);
for(int i=v.size(); i<sz; i++) tr[i+sz] = segment(ilvuoto);
for(int i=sz; --i;){
vector<int> treesus(sz2);
for(int j=0; j<sz2; j++) treesus[j] = max(tr[2*i].tr[j+tr[2*i].sz], tr[2*i+1].tr[j+tr[2*i+1].sz]);
tr[i] = segment(treesus);
}
}
int query(int l, int r, int ql, int qr){
int ans = 0;
for(l+=sz, r+=sz; l<r; l>>=1, r>>=1){
if(l & 1) ans = max(ans, tr[l++].query(ql, qr));
if(r & 1) ans = max(ans, tr[--r].query(ql, qr));
}
return ans;
}
};
long long count_rectangles(vector<vector<int>> a) {
int n = a.size();
int m = a[0].size();
vector<vector<int>> up(n, vector<int>(m, -1)), down(n, vector<int>(m, n)), left(n, vector<int>(m, -1)), right(n, vector<int>(m, m));
//right
for(int i=0; i<n; i++){
stack<int> s;
for(int j=0; j<m; j++){
while(s.size() and a[i][s.top()] < a[i][j]){
right[i][s.top()] = j;
s.pop();
}
s.push(j);
}
}
//left
for(int i=0; i<n; i++){
stack<int> s;
for(int j=m-1; j>=0; j--){
while(s.size() and a[i][s.top()] < a[i][j]){
left[i][s.top()] = j;
s.pop();
}
s.push(j);
}
}
//up
for(int j=0; j<m; j++){
stack<int> s;
for(int i=n-1; i>=0; i--){
while(s.size() and a[s.top()][j] < a[i][j]){
up[s.top()][j] = i;
s.pop();
}
s.push(i);
}
}
//down
for(int j=0; j<m; j++){
stack<int> s;
for(int i=0; i<n; i++){
while(s.size() and a[s.top()][j] < a[i][j]){
down[s.top()][j] = i;
s.pop();
}
s.push(i);
}
}
vector<vector<array<int, 4>>> borders(n, vector<array<int, 4>>(m, {m, -1, n, -1}));
auto merge = [&](int x1, int y1, int x2, int y2){
borders[x1][y1][0] = min(borders[x1][y1][0], borders[x2][y2][0]);
borders[x1][y1][1] = max(borders[x1][y1][1], borders[x2][y2][1]);
borders[x1][y1][2] = min(borders[x1][y1][2], borders[x2][y2][2]);
borders[x1][y1][3] = max(borders[x1][y1][3], borders[x2][y2][3]);
};
vector<pair<int,int>> dir = {{0, 1}, {0, -1}, {1, 0}, {-1, 0}};
vector<vector<int>> vis(n, vector<int>(m));
auto dfs = [&](auto &&dfs, int i, int j){
vis[i][j] = 1;
borders[i][j] = {left[i][j], right[i][j], up[i][j], down[i][j]};
if(i == 0 or i == n-1 or j == 0 or j == m-1) return;
for(auto [di, dj]: dir){
if(a[i][j] < a[i+di][j+dj]) continue;
if(!vis[i+di][j+dj]) dfs(dfs, i+di, j+dj);
merge(i, j, i+di, j+dj);
}
};
vector<array<int, 3>> pts;
for(int i=1; i<n-1; i++){
for(int j=1; j<m-1; j++){
pts.push_back({a[i][j], i, j});
}
}
sort(pts.begin(), pts.end());
segment2d st(a);
vector<array<int, 4>> rects;
for(auto [h, i, j]: pts){
if(!vis[i][j]) dfs(dfs, i, j);
else continue;
int l = left[i][j], r = right[i][j], u = up[i][j], d = down[i][j];
if(l == -1 or r == m or u == -1 or d == n) continue;
if(st.query(u+1, d, l+1, r) > h) continue;
if(borders[i][j][0] == l and borders[i][j][1] == r and borders[i][j][2] == u and borders[i][j][3] == d ){
rects.push_back({l, r, u, d});
// cerr << i << " " << j << endl;
// cerr << l << " " << r << " " << u << " " << d << endl;
// cerr << st.query(l+1, r, u+1, d) << endl;
}
}
// for(int i=0; i<n; i++){
// for(int j=0; j<m; j++){
// cout << left[i][j] << " ";
// }
// cout << endl;
// }
sort(rects.begin(), rects.end());
return unique(rects.begin(), rects.end()) - rects.begin();
}
/*
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⣀⣠⣤⣤⣤⣄⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⣤⡴⡖⣻⡟⣛⡛⣿⣿⣿⣿⣻⣿⣿⡟⠛⠳⣦⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣠⣾⣿⣯⣾⣤⣹⣷⣿⣿⡿⣿⡿⣿⣿⣿⣿⣼⣧⣄⣚⠉⠛⠶⢶⣤⣀⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣴⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣗⣙⠾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣶⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢘⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠿⠿⠿⠛⠛⠛⠛⠿⠿⠿⠿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣧⣀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣾⣿⣿⣿⣿⣿⡿⠛⠉⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠉⠙⠻⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⣿⣿⣿⣿⣿⠟⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠙⠻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡆⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠸⣿⣿⣿⣯⡿⠀⠀⠀⠀⠀⠀⠀⠠⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⡀⢀⣀⣄⡀⠀⠀⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢠⣿⣿⣿⣿⡇⣠⣾⣿⣿⣶⣶⣶⣶⣿⣦⡀⠀⠻⣤⣶⣾⣿⣿⣿⣿⣿⠿⠿⣿⣶⣄⠈⣿⡇⢹⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢠⣿⣿⣿⣿⣿⠁⡿⠟⣉⣽⣿⣿⣿⣿⣿⣿⡗⠀⠀⢈⣿⣿⣿⣿⣿⣿⣿⣷⣾⣿⣿⣿⣦⣹⡇⣽⣿⣿⣿⣿⣿⣿⣿⠀⣀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⢀⠴⠂⠀⣀⣤⣾⣿⣿⣿⣿⣿⡿⠀⢱⣿⣿⣏⣛⣛⣣⢬⣹⢿⠏⠀⢀⣼⣿⣯⡛⠒⢽⣿⣥⡿⣿⣿⣿⣿⣿⣿⣇⣿⣿⣿⣿⣿⣿⣿⣍⣉⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⣰⣿⠤⣶⣿⠿⣻⣿⣿⣿⣿⣿⣿⡇⠀⠀⠋⠀⠉⠉⠁⠒⠉⠀⠀⡀⠀⠀⢿⣿⣿⠛⠦⠀⠀⢸⡿⠋⠋⠙⠻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⡛⣆⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠈⠉⠉⢡⣰⣥⠾⣿⣿⣿⣿⣿⣿⣿⣿⡅⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⡾⠁⠀⠀⢸⡿⣿⡀⠀⠀⠀⠀⠀⠀⠀⠀⣰⣾⣿⣿⣿⣿⡹⣿⣿⣿⣿⣿⣿⣦⡀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⢀⡕⠽⣾⣿⣿⣿⣿⣿⣿⣿⣿⣧⠀⠀⠀⠀⠀⠀⠀⠀⢠⣿⣶⣶⣤⣶⣿⣷⣼⣧⡀⠀⠀⠀⠠⠀⢀⣰⣿⣿⣿⣿⣿⣿⣷⣻⣿⣿⣿⣿⣿⣿⢿⣿⣶⠄
⠀⠀⠀⠀⠀⠀⠀⠀⡞⠀⢀⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣆⠀⠀⠀⠀⠀⠀⢠⠎⠻⠯⣍⠙⠟⢻⣿⠿⣿⠟⠀⠀⠀⣶⣦⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣟⠳⣌⢣⠀
⠀⠀⠀⠀⠀⠀⠀⠀⣡⠖⠙⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡀⠀⠀⠀⠀⠀⠈⠀⢀⣴⣿⠟⠁⢾⣿⣷⣄⡀⡀⠀⠀⠿⠟⢹⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠈⠁⠀⣧
⠀⠀⠀⠀⠀⠀⠀⣼⠃⠀⠀⣽⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡤⠀⠀⠀⣠⣾⣾⠟⢛⣁⣤⣠⣼⣿⣿⣿⣿⣿⣶⣄⣠⣾⣫⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠙⠷⣦⣾⣿⠟⢿⣿⣿⣿⣿⣿⣿⣿⣿⠘⣷⣱⠀⣼⣿⡯⡿⠾⠛⠛⠛⠛⠛⢻⣿⣿⠿⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣴⠋⠀⠀⣻⣿⣿⣿⣿⣿⣿⣿⣷⣿⣷⠃⢿⡟⠀⠀⠰⣦⣤⣤⣴⣶⣿⣿⣿⣤⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠇⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⡶⢿⣷⣦⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⠈⠀⠀⠀⠀⠀⠛⠉⠛⠛⠛⠻⣿⢟⣉⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡏⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠘⣼⣌⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡀⣽⣷⡶⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⡘⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣯⣿⡇⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣾⣿⣷⣶⣠⣤⣠⣦⡡⣠⣼⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠇⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠑⠦⣽⡿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⣿⣿⣿⣿⠉⡆⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠿⠟⠛⠉⢿⣿⣿⣿⣿⣿⣿⣿⣿⡾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⢿⣿⣟⡿⣻⣿⠟⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣀⣠⣤⠴⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣾⣿⣿⣿⣿⣿⣿⣿⣟⡛⠁⠘⠋⠁⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⢀⣀⣀⣀⣀⣀⣤⢴⣾⠿⣉⣽⠞⠁⠹⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⢿⣿⣻⣿⣿⣿⣿⣿⣿⣿⡏⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⡿⠒⠾⣿⣭⣌⡉⠉⠙⠳⠟⢁⣐⠛⠃⠀⢐⡶⠉⠉⠻⣿⣿⣿⣿⣯⡙⢿⣯⣉⠉⠻⣿⣿⣏⢿⣿⣿⣿⣿⣿⣬⣿⣿⣿⣿⣿⣿⣿⣿⣿⣧⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⣧⢐⡦⣌⠙⢮⡹⠛⢶⣤⣶⣯⣍⢰⠋⠄⠘⠁⠀⠀⠀⠈⠍⠛⠻⢿⣿⣷⣍⡻⣿⣶⣮⣙⠿⢾⣿⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⣿⣷⣤⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⣿⣿⠆⣈⠵⠶⠈⢺⡉⠙⠿⣿⣿⣿⣷⡷⠂⠀⠀⠀⠰⣾⡄⢀⠀⠀⢸⣿⣿⣿⣿⣿⣿⣿⣿⢿⣌⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣍⣽⣿⡜⣆⠳⣯⡲⣤⣀⠀⠀⠀⠀⠀⠀⠀
⣿⣿⡌⡄⠀⠀⠀⠀⠙⢶⣄⠀⠙⢿⣿⣟⣀⠀⠀⠀⠀⠈⢿⣾⡇⠀⠀⠀⣮⢙⣿⣿⣿⣿⣿⣿⣿⣻⣿⣿⣛⣿⣿⣿⣿⣿⣿⣿⣿⡿⠉⢿⡀⠀⠙⢿⣎⢿⣿⣶⣤⣀⠀⠀⠀
⣿⣿⣷⡹⠀⠀⠀⠀⠀⠀⠈⠻⢦⣄⡙⢻⣿⣾⣤⡀⠀⠀⠈⢿⣿⡀⠀⠀⠹⣾⠟⣿⣿⣿⣿⣿⣿⣿⡏⣿⣿⣿⣿⣿⣿⣿⠿⡛⠑⠀⠂⠸⡿⠝⠀⠄⢻⣧⢻⣆⠉⡹⠿⣿⡂
⣿⣿⣿⣏⠁⠀⠀⠀⠀⠀⠀⠀⠀⠉⠛⢻⣿⣿⣿⣿⣷⣄⣀⠈⣿⣷⣄⠀⠘⠙⠰⢿⣿⣿⣿⣿⣿⣿⣧⣚⣿⣿⣯⡋⠄⠰⢉⡀⠀⠀⠀⠀⠀⠀⠀⠀⠘⣿⣧⢻⣦⠘⡇⠈⠛
⣿⣿⣿⣿⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠉⠈⠉⠙⠛⠛⠻⠾⣿⣿⣟⣷⠀⠀⢪⠙⢿⣿⣿⢿⣿⣿⠙⢻⣿⣿⠁⠶⠔⠈⢑⠋⠀⠀⠀⠀⠀⡀⠀⠀⢿⣿⣧⣙⠦⢻⡀⠀
⣿⣿⣿⣿⣧⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠙⣿⣿⣿⡆⠀⠘⠷⣷⣧⣽⣾⣯⣿⡗⠸⣿⣿⠀⠠⢰⠚⠊⠀⠂⠀⠀⠀⠀⡌⠈⠒⠘⡿⡁⢹⣶⣾⡇⠀
⣿⣿⣿⣿⣿⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠻⣿⡇⢀⠀⠀⠸⡏⡿⢷⣜⢿⡇⠀⣿⣿⡀⠆⢀⠀⠂⠀⠀⡀⠀⠀⠂⠀⠀⠀⠀⠀⠀⠀⢿⡿⠁⠀
⣿⣿⣿⣿⣿⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠙⢿⣆⠀⠀⠀⠁⠀⠀⠙⣿⡇⠀⣿⣿⡇⠀⠀⠀⠀⠀⠀⠈⠂⠀⠐⠁⠀⠀⠀⠀⠀⠀⢸⠅⠀⠀
⣿⣿⣿⣿⣿⣷⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠿⣦⡀⠀⠀⠀⠀⠀⠃⣿⠀⣿⣿⡇⢀⠀⠀⠀⠀⠀⠀⠀⠘⠆⠀⠀⠀⠀⠀⠀⠀⡸⣦⠀⢀
⣿⣿⣿⣿⣿⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠹⣷⡄⠀⣸⣿⡄⠀⡏⠀⢿⢿⡇⠀⠄⠀⠀⠘⠀⠀⠀⠀⠀⠀⢀⠀⠀⠀⡄⠀⠀⣿⣿⣿
⣿⣿⣿⣿⣿⣿⡇⠀⠀⠀⠀⠀⠀⠀⠀⢀⠀⡀⠀⠀⠀⠀⠀⡀⠀⠀⠀⠀⠀⡀⠀⠀⠙⡽⢣⡜⠐⠹⠆⠁⠀⢺⣿⡇⠀⠀⠀⠀⠀⠀⢡⡂⠐⠀⠂⢤⡀⠈⠀⠀⠀⢀⣿⣿⣿
*/
