This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "rect.h"
#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef long long ll;
long long count_rectangles(vvi a) {
int n = a.size();
int m = a[0].size();
ll result = 0;
for (int r1 = 1; r1 < n - 1; r1++) {
for (int r2 = r1; r2 < n - 1; r2++) {
for (int c1 = 1; c1 < m - 1; c1++) {
for (int c2 = c1; c2 < m - 1; c2++) {
bool success = true;
for (int i = r1; i <= r2; i++) {
for (int j = c1; j <= c2; j++) {
if (a[i][j] >= a[i][c1 - 1] || a[i][j] >= a[i][c2 + 1] || a[i][j] >= a[r1 - 1][j] || a[i][j] >= a[r2 + 1][j]) {
success = false;
break;
}
}
if (!success) {
break;
}
}
if (success) {
result++;
}
}
}
}
}
return result;
}
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