#include "rect.h"
#include <bits/stdc++.h>
#pragma GCC target("avx2")
using namespace std;
constexpr short LOG = 11;
constexpr short smal = -1e4;
struct tavola_sparsa{
vector<vector<short>> sp;
tavola_sparsa(vector<short> &v){
short n = v.size();
sp.resize(LOG, vector<short>(n));
sp[0] = v;
for(int i=1; i<LOG; i++){
for(int j=0; j<=(n - (1<<i)); j++){
sp[i][j] = max(sp[i-1][j], sp[i-1][j + (1 << (i-1))]);
}
}
}
tavola_sparsa() {}
short query(short l, short r){
short log = 31 - __builtin_clz(r-l);
return max(sp[log][l], sp[log][r-(1<<log)]);
}
};
struct segment2d{
vector<tavola_sparsa> tr;
int sz;
segment2d(vector<vector<short>> &v){
sz = 1;
while(sz < v.size()) sz *= 2;
tr.resize(2*sz);
int sz2 = v[0].size();
vector<short> ilvuoto(sz2);
vector<short> treesus(sz2);
for(int i=0; i<v.size(); i++) tr[i+sz] = tavola_sparsa(v[i]);
for(int i=v.size(); i<sz; i++) tr[i+sz] = tavola_sparsa(ilvuoto);
for(int i=sz; --i;){
for(int j=0; j<sz2; j++) treesus[j] = max(tr[2*i].query(j, j+1), tr[2*i+1].query(j, j+1));
tr[i] = tavola_sparsa(treesus);
}
}
int query(int l, int r, int ql, int qr){
short ans = smal;
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 up(n, vector<short>(m, -1)), down(n, vector<short>(m, n)), left(n, vector<short>(m, -1)), right(n, vector<short>(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);
}
}
int ans = 0;
vector querysus(n, vector<bool>(m, true));
segment2d lesegment(right);
for(int i=1; i<n-1; i++){
for(int j=1; j<m-1; j++){
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){
querysus[i][j] = 0;
continue;
}
if(querysus[i][j] and r != lesegment.query(u+1, d, l+1, r)) querysus[i][j] = 0;
}
}
lesegment.~segment2d();
new (&lesegment)segment2d(down);
for(int i=1; i<n-1; i++){
for(int j=1; j<m-1; j++){
int l = left[i][j], r = right[i][j], u = up[i][j], d = down[i][j];
if(querysus[i][j] and d != lesegment.query(u+1, d, l+1, r)) querysus[i][j] = 0;
}
}
vector somethingsus(n, vector<short>(m));
for(int i=0; i<n; i++){
for(int j=0; j<m; j++){
somethingsus[i][j] = -left[i][j];
}
}
lesegment.~segment2d();
new (&lesegment)segment2d(somethingsus);
for(int i=1; i<n-1; i++){
for(int j=1; j<m-1; j++){
int l = left[i][j], r = right[i][j], u = up[i][j], d = down[i][j];
if(querysus[i][j] and l != -lesegment.query(u+1, d, l+1, r)) querysus[i][j] = 0;
}
}
for(int i=0; i<n; i++){
for(int j=0; j<m; j++){
somethingsus[i][j] = -up[i][j];
}
}
lesegment.~segment2d();
new (&lesegment)segment2d(somethingsus);
for(int i=1; i<n-1; i++){
for(int j=1; j<m-1; j++){
int l = left[i][j], r = right[i][j], u = up[i][j], d = down[i][j];
if(querysus[i][j] and u != -lesegment.query(u+1, d, l+1, r)) querysus[i][j] = 0;
}
}
vector<array<int, 4>> grind;
for(int i=1; i<n-1; i++){
for(int j=1; j<m-1; j++){
int l = left[i][j], r = right[i][j], u = up[i][j], d = down[i][j];
if(querysus[i][j]){
grind.push_back({l, r, u, d});
}
}
}
sort(grind.begin(), grind.end());
return unique(grind.begin(), grind.end()) - grind.begin();
}
/*
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⣀⣠⣤⣤⣤⣄⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⣤⡴⡖⣻⡟⣛⡛⣿⣿⣿⣿⣻⣿⣿⡟⠛⠳⣦⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣠⣾⣿⣯⣾⣤⣹⣷⣿⣿⡿⣿⡿⣿⣿⣿⣿⣼⣧⣄⣚⠉⠛⠶⢶⣤⣀⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣴⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣗⣙⠾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣶⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢘⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠿⠿⠿⠛⠛⠛⠛⠿⠿⠿⠿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣧⣀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣾⣿⣿⣿⣿⣿⡿⠛⠉⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠉⠙⠻⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⣿⣿⣿⣿⣿⠟⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠙⠻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡆⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠸⣿⣿⣿⣯⡿⠀⠀⠀⠀⠀⠀⠀⠠⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⡀⢀⣀⣄⡀⠀⠀⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢠⣿⣿⣿⣿⡇⣠⣾⣿⣿⣶⣶⣶⣶⣿⣦⡀⠀⠻⣤⣶⣾⣿⣿⣿⣿⣿⠿⠿⣿⣶⣄⠈⣿⡇⢹⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢠⣿⣿⣿⣿⣿⠁⡿⠟⣉⣽⣿⣿⣿⣿⣿⣿⡗⠀⠀⢈⣿⣿⣿⣿⣿⣿⣿⣷⣾⣿⣿⣿⣦⣹⡇⣽⣿⣿⣿⣿⣿⣿⣿⠀⣀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⢀⠴⠂⠀⣀⣤⣾⣿⣿⣿⣿⣿⡿⠀⢱⣿⣿⣏⣛⣛⣣⢬⣹⢿⠏⠀⢀⣼⣿⣯⡛⠒⢽⣿⣥⡿⣿⣿⣿⣿⣿⣿⣇⣿⣿⣿⣿⣿⣿⣿⣍⣉⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⣰⣿⠤⣶⣿⠿⣻⣿⣿⣿⣿⣿⣿⡇⠀⠀⠋⠀⠉⠉⠁⠒⠉⠀⠀⡀⠀⠀⢿⣿⣿⠛⠦⠀⠀⢸⡿⠋⠋⠙⠻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⡛⣆⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠈⠉⠉⢡⣰⣥⠾⣿⣿⣿⣿⣿⣿⣿⣿⡅⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⡾⠁⠀⠀⢸⡿⣿⡀⠀⠀⠀⠀⠀⠀⠀⠀⣰⣾⣿⣿⣿⣿⡹⣿⣿⣿⣿⣿⣿⣦⡀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⢀⡕⠽⣾⣿⣿⣿⣿⣿⣿⣿⣿⣧⠀⠀⠀⠀⠀⠀⠀⠀⢠⣿⣶⣶⣤⣶⣿⣷⣼⣧⡀⠀⠀⠀⠠⠀⢀⣰⣿⣿⣿⣿⣿⣿⣷⣻⣿⣿⣿⣿⣿⣿⢿⣿⣶⠄
⠀⠀⠀⠀⠀⠀⠀⠀⡞⠀⢀⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣆⠀⠀⠀⠀⠀⠀⢠⠎⠻⠯⣍⠙⠟⢻⣿⠿⣿⠟⠀⠀⠀⣶⣦⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣟⠳⣌⢣⠀
⠀⠀⠀⠀⠀⠀⠀⠀⣡⠖⠙⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡀⠀⠀⠀⠀⠀⠈⠀⢀⣴⣿⠟⠁⢾⣿⣷⣄⡀⡀⠀⠀⠿⠟⢹⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠈⠁⠀⣧
⠀⠀⠀⠀⠀⠀⠀⣼⠃⠀⠀⣽⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡤⠀⠀⠀⣠⣾⣾⠟⢛⣁⣤⣠⣼⣿⣿⣿⣿⣿⣶⣄⣠⣾⣫⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠙⠷⣦⣾⣿⠟⢿⣿⣿⣿⣿⣿⣿⣿⣿⠘⣷⣱⠀⣼⣿⡯⡿⠾⠛⠛⠛⠛⠛⢻⣿⣿⠿⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣴⠋⠀⠀⣻⣿⣿⣿⣿⣿⣿⣿⣷⣿⣷⠃⢿⡟⠀⠀⠰⣦⣤⣤⣴⣶⣿⣿⣿⣤⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠇⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⡶⢿⣷⣦⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⠈⠀⠀⠀⠀⠀⠛⠉⠛⠛⠛⠻⣿⢟⣉⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡏⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠘⣼⣌⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡀⣽⣷⡶⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⡘⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣯⣿⡇⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣾⣿⣷⣶⣠⣤⣠⣦⡡⣠⣼⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠇⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠑⠦⣽⡿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⣿⣿⣿⣿⠉⡆⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠿⠟⠛⠉⢿⣿⣿⣿⣿⣿⣿⣿⣿⡾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⢿⣿⣟⡿⣻⣿⠟⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣀⣠⣤⠴⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣾⣿⣿⣿⣿⣿⣿⣿⣟⡛⠁⠘⠋⠁⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⢀⣀⣀⣀⣀⣀⣤⢴⣾⠿⣉⣽⠞⠁⠹⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⢿⣿⣻⣿⣿⣿⣿⣿⣿⣿⡏⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⡿⠒⠾⣿⣭⣌⡉⠉⠙⠳⠟⢁⣐⠛⠃⠀⢐⡶⠉⠉⠻⣿⣿⣿⣿⣯⡙⢿⣯⣉⠉⠻⣿⣿⣏⢿⣿⣿⣿⣿⣿⣬⣿⣿⣿⣿⣿⣿⣿⣿⣿⣧⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⣧⢐⡦⣌⠙⢮⡹⠛⢶⣤⣶⣯⣍⢰⠋⠄⠘⠁⠀⠀⠀⠈⠍⠛⠻⢿⣿⣷⣍⡻⣿⣶⣮⣙⠿⢾⣿⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⣿⣷⣤⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⣿⣿⠆⣈⠵⠶⠈⢺⡉⠙⠿⣿⣿⣿⣷⡷⠂⠀⠀⠀⠰⣾⡄⢀⠀⠀⢸⣿⣿⣿⣿⣿⣿⣿⣿⢿⣌⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣍⣽⣿⡜⣆⠳⣯⡲⣤⣀⠀⠀⠀⠀⠀⠀⠀
⣿⣿⡌⡄⠀⠀⠀⠀⠙⢶⣄⠀⠙⢿⣿⣟⣀⠀⠀⠀⠀⠈⢿⣾⡇⠀⠀⠀⣮⢙⣿⣿⣿⣿⣿⣿⣿⣻⣿⣿⣛⣿⣿⣿⣿⣿⣿⣿⣿⡿⠉⢿⡀⠀⠙⢿⣎⢿⣿⣶⣤⣀⠀⠀⠀
⣿⣿⣷⡹⠀⠀⠀⠀⠀⠀⠈⠻⢦⣄⡙⢻⣿⣾⣤⡀⠀⠀⠈⢿⣿⡀⠀⠀⠹⣾⠟⣿⣿⣿⣿⣿⣿⣿⡏⣿⣿⣿⣿⣿⣿⣿⠿⡛⠑⠀⠂⠸⡿⠝⠀⠄⢻⣧⢻⣆⠉⡹⠿⣿⡂
⣿⣿⣿⣏⠁⠀⠀⠀⠀⠀⠀⠀⠀⠉⠛⢻⣿⣿⣿⣿⣷⣄⣀⠈⣿⣷⣄⠀⠘⠙⠰⢿⣿⣿⣿⣿⣿⣿⣧⣚⣿⣿⣯⡋⠄⠰⢉⡀⠀⠀⠀⠀⠀⠀⠀⠀⠘⣿⣧⢻⣦⠘⡇⠈⠛
⣿⣿⣿⣿⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠉⠈⠉⠙⠛⠛⠻⠾⣿⣿⣟⣷⠀⠀⢪⠙⢿⣿⣿⢿⣿⣿⠙⢻⣿⣿⠁⠶⠔⠈⢑⠋⠀⠀⠀⠀⠀⡀⠀⠀⢿⣿⣧⣙⠦⢻⡀⠀
⣿⣿⣿⣿⣧⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠙⣿⣿⣿⡆⠀⠘⠷⣷⣧⣽⣾⣯⣿⡗⠸⣿⣿⠀⠠⢰⠚⠊⠀⠂⠀⠀⠀⠀⡌⠈⠒⠘⡿⡁⢹⣶⣾⡇⠀
⣿⣿⣿⣿⣿⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠻⣿⡇⢀⠀⠀⠸⡏⡿⢷⣜⢿⡇⠀⣿⣿⡀⠆⢀⠀⠂⠀⠀⡀⠀⠀⠂⠀⠀⠀⠀⠀⠀⠀⢿⡿⠁⠀
⣿⣿⣿⣿⣿⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠙⢿⣆⠀⠀⠀⠁⠀⠀⠙⣿⡇⠀⣿⣿⡇⠀⠀⠀⠀⠀⠀⠈⠂⠀⠐⠁⠀⠀⠀⠀⠀⠀⢸⠅⠀⠀
⣿⣿⣿⣿⣿⣷⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠿⣦⡀⠀⠀⠀⠀⠀⠃⣿⠀⣿⣿⡇⢀⠀⠀⠀⠀⠀⠀⠀⠘⠆⠀⠀⠀⠀⠀⠀⠀⡸⣦⠀⢀
⣿⣿⣿⣿⣿⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠹⣷⡄⠀⣸⣿⡄⠀⡏⠀⢿⢿⡇⠀⠄⠀⠀⠘⠀⠀⠀⠀⠀⠀⢀⠀⠀⠀⡄⠀⠀⣿⣿⣿
⣿⣿⣿⣿⣿⣿⡇⠀⠀⠀⠀⠀⠀⠀⠀⢀⠀⡀⠀⠀⠀⠀⠀⡀⠀⠀⠀⠀⠀⡀⠀⠀⠙⡽⢣⡜⠐⠹⠆⠁⠀⢺⣿⡇⠀⠀⠀⠀⠀⠀⢡⡂⠐⠀⠂⢤⡀⠈⠀⠀⠀⢀⣿⣿⣿
*/
