#include <bits/stdc++.h>
typedef long long ll;
#define FOR(i,x,y) for(ll i=x; i<y; i++)
#define FORNEG(i,x,y) for(ll i=x; i>y; i--)
using namespace std;
#define ll int
ll pos[10000000][2];
ll pref[5001][5001];
ll r, c, h, w;
bool check(ll x){
pref.clear();
FOR(i,1,x+1){
ll a = pos[i][0];
ll b = pos[i][1];
pref[a+1][b+1] += 1;
pref[max(0, a+1-w)][b+1] -= 1;
pref[a+1][max(0, b+1-h)] -= 1;
pref[max(0, a+1-w)][max(0, b+1-h)] += 1;
FOR(i,0,5002){
FOR(j,1,5002){
pref[i][j] += pref[i-1][j];
}
}
FOR(i,0,5002){
FOR(j,1,5002){
pref[j][i] += pref[j-1][i];
}
}
FOR(i,0,5002){
FOR(j,0,5002){
if (pref[i][j] > (r+c)/2){
return true;
}
}
}
return false;
}
}
int rectangle(int R, int C, int H, int W, int Q[3001][3001]) {
r = R; c = C; h = H; w = W;
FOR(i,0,R){
FOR(j,0,C){
pos[Q[i][j]][0] = i;
pos[Q[i][j]][1] = j;
}
}
int lo = 0;
int hi = int(R*C/2)+1;
while (lo < hi) {
int mid = lo + (hi - lo) / 2;
if (check(mid)) {
hi = mid;
} else {
lo = mid + 1;
}
}
return lo;
}
Compilation message
quality.cpp: In function 'bool check(int)':
quality.cpp:14:10: error: request for member 'clear' in 'pref', which is of non-class type 'int [5001][5001]'
14 | pref.clear();
| ^~~~~
quality.cpp:44:1: warning: control reaches end of non-void function [-Wreturn-type]
44 | }
| ^
