#include <bits/stdc++.h>
using namespace std;
int H; // liczba wierszy
int W; // liczba kolumn
vector<vector<int>> height;
vector<vector<bool>> visited;
vector<pair<int,int>> moves = { {-1,0}, {1,0}, {0,-1}, {0,1} };
bool in_range(int vi, int vj, int i1, int j1, int i2, int j2) {
return i1 <= vi && vi <= i2 && j1 <= vj && vj <= j2;
}
void dfs(int vi, int vj, int i1, int j1, int i2, int j2) {
visited[vi][vj] = true;
height[0][0] = INT_MIN;
int mi = 0, mj = 0;
for (const auto& [di, dj]: moves) if (in_range(vi+di,vj+dj, i1,j1, i2,j2) && !visited[vi+di][vj+dj] && height[vi+di][vj+dj] < height[vi][vj]) {
if (height[mi][mj] < height[vi+di][vj+dj]) mi = vi+di, mj = vj+dj;
}
if (mi == 0 && mj == 0) return;
dfs(mi,mj, i1,j1, i2,j2);
}
void visualize(int i1, int j1, int i2, int j2) {
for (int i=1; i<=H; i++) {
for (int j=1; j<=W; j++) {
if (in_range(i,j, i1,j1, i2,j2)) cout << '#';
else cout << '.';
}
cout << '\n';
}
cout << '\n';
}
bool check(int i1, int j1, int i2, int j2) {
int vi = i1;
int vj = j1;
for (int i=i1; i<=i2; i++) for (int j=j1; j<=j2; j++) {
visited[i][j] = false;
if (height[i][j] > height[vi][vj]) vi = i, vj = j;
}
dfs(vi,vj, i1,j1, i2,j2);
for (int i=i1; i<=i2; i++) for (int j=j1; j<=j2; j++) if (!visited[i][j]) return false;
// visualize(i1, j1, i2, j2);
return true;
}
void subtask_2() {
int ans = 0;
for (int i1=1; i1<=H; i1++) for (int j1=1; j1<=W; j1++) for (int i2=i1; i2<=H; i2++) for (int j2=j1; j2<=W; j2++)
ans += check(i1,j1,i2,j2);
cout << ans << '\n';
}
int main() {
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin >> H >> W;
height.assign(H+1, vector<int>(W+1, 0));
visited.assign(H+1, vector<bool>(W+1, false));
for (int i=1; i<=H; i++) for (int j=1; j<=W; j++) cin >> height[i][j];
subtask_2();
}
