#include"quality.h"
#include "bits/stdc++.h"
using namespace std;
#define ll long long
#define forn(i,n) for(int i=0;i<n;i++)
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(),v.rend()
#define pb push_back
#define sz(a) (int)a.size()
const int N = 3001;
int p1[N][N];
int p2[N][N];
int smaller(int x1, int y1, int x2, int y2){
return p1[x2][y2] - p1[x1 - 1][y2] - p1[x2][y1 - 1] + p1[x1 - 1][y1 - 1];
}
int fuck(int x1, int y1, int x2, int y2){
return p2[x2][y2] - p2[x1 - 1][y2] - p2[x2][y1 - 1] + p2[x1 - 1][y1 - 1];
}
int rectangle(int n, int m, int a, int b, int c[3001][3001]){
int ans = INT_MAX;
int l = 1,r = n * m;
while(l <= r)
{
int mid = l + r >> 1;
forn(i, N)forn(j, N)p[i][j] = 0;
for(int i = 0;i < n;++i){
for(int j = 0;j < m;++j){
if(c[i][j] < mid)p1[i + 1][j + 1] = 1;
if(c[i][j] > mid)p2[i + 1][j + 1] = 1;
}
}
for(int i = 1;i <= n;++i){
for(int j = 1;j <= m;++j){
p1[i][j] += p1[i - 1][j] + p1[i][j - 1] - p1[i - 1][j - 1];
p2[i][j] += p2[i - 1][j] + p2[i][j - 1] - p2[i - 1][j - 1];
}
}
bool ok = false;
for(int i = 0;i + a - 1 < n;++i){
for(int j = 0;j + b - 1 < m;++j){
int sm = smaller(i + 1, j + 1, i + a, j + b);
int gr = fuck(i + 1, j + 1, i + a, j + b);
if(sm == gr){
ans = min(ans, mid);
ok = true;
}else if(sm > gr)ok = true;
}
}
if(ok){
r = mid - 1;
}else l = mid + 1;
}
return ans;
}
Compilation message
quality.cpp: In function 'int rectangle(int, int, int, int, int (*)[3001])':
quality.cpp:32:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
32 | int mid = l + r >> 1;
| ~~^~~
quality.cpp:33:29: error: 'p' was not declared in this scope
33 | forn(i, N)forn(j, N)p[i][j] = 0;
| ^
