#include <bits/stdc++.h>
using namespace std;
struct segment_tree{
int N;
vector<int> ST;
segment_tree(){
}
segment_tree(vector<int> A){
int N2 = A.size();
N = 1;
while (N < N2){
N *= 2;
}
ST = vector<int>(N * 2 - 1, 0);
for (int i = 0; i < N2; i++){
ST[N - 1 + i] = A[i];
}
for (int i = N - 2; i >= 0; i--){
ST[i] = max(ST[i * 2 + 1], ST[i * 2 + 2]);
}
}
int range_max(int L, int R, int i, int l, int r){
if (r <= L || R <= l){
return 0;
} else if (L <= l && r <= R){
return ST[i];
} else {
int m = (l + r) / 2;
return max(range_max(L, R, i * 2 + 1, l, m), range_max(L, R, i * 2 + 2, m, r));
}
}
int range_max(int L, int R){
return range_max(L, R, 0, 0, N);
}
};
long long count_rectangles(vector<vector<int>> a){
int n = a.size();
int m = a[0].size();
assert(n <= 700 && m <= 700);
vector<segment_tree> STh(n);
for (int i = 0; i < n; i++){
STh[i] = segment_tree(a[i]);
}
vector<segment_tree> STv(m);
for (int i = 0; i < m; i++){
vector<int> b(n);
for (int j = 0; j < n; j++){
b[j] = a[j][i];
}
STv[i] = segment_tree(b);
}
set<tuple<int, int, int, int>> st;
for (int i = 1; i < n - 1; i++){
for (int j = 1; j < m - 1; j++){
int l = j;
while (l > 0){
if (a[i][l - 1] > a[i][j]){
break;
}
l--;
}
int r = j + 1;
while (r < m){
if (a[i][r] > a[i][j]){
break;
}
r++;
}
int u = i;
while (u > 0){
if (a[u - 1][j] > a[i][j]){
break;
}
u--;
}
int d = i + 1;
while (d < n){
if (a[d][j] > a[i][j]){
break;
}
d++;
}
if (l > 0 && r < m && u > 0 && d < n){
if (st.count(make_tuple(l, r, u, d)) == 0){
bool ok = true;
for (int x = u; x < d; x++){
if (STh[x].range_max(l, r) >= min(a[x][l - 1], a[x][r])){
ok = false;
}
}
for (int y = l; y < r; y++){
if (STv[y].range_max(u, d) >= min(a[u - 1][y], a[d][y])){
ok = false;
}
}
if (ok){
st.insert(make_tuple(l, r, u, d));
}
}
}
}
}
return st.size();
}
