Submission #1249092

#	Time	Username	Problem	Language	Result	Execution time	Memory
1249092		basa	Quality Of Living (IOI10_quality)	C++20	100 / 100	1555 ms	71000 KiB

quality

#include "bits/stdc++.h"
#include "quality.h"

using namespace std;

int pref[3005][3005];
bool check(int m, int r, int c, int h, int w, int q[3001][3001]){
  memset(pref, 0, sizeof pref);
  for(int i = 1; i <= r; i++){
    for(int j = 1; j <= c; j++){
      pref[i][j] = pref[i - 1][j] + pref[i][j - 1] - pref[i - 1][j - 1];
      if(q[i - 1][j - 1] > m) pref[i][j]++;
    }
  }

  bool valid = 0;
  for(int i = 1; i <= r - h + 1; i++){
    for(int j = 1; j <= c - w + 1; j++){
      int br = i + h - 1, bc = j + w - 1;
      if((pref[br][bc] - pref[i - 1][bc] - pref[br][j - 1] + pref[i - 1][j - 1]) <= (h * w) / 2) valid = 1;
    }
  }

  if(valid) return 1;
  return 0;
}

int rectangle(int n, int m, int h, int w, int q[3001][3001]){
  int l = 1, r = n * m;
  while(l <= r){
    int mid = (l + r) / 2;

    if(check(mid, n, m, h, w, q)) r = mid - 1;
    else l = mid + 1;
  }

  return r + 1;
}

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 20 / 20