Submission #1009141

#	Time	Username	Problem	Language	Result	Execution time	Memory
1009141		Muaath_5	Quality Of Living (IOI10_quality)	C++17	0 / 100	1 ms	2392 KiB

quality

#include "quality.h"
#include <bits/stdc++.h>
using namespace std;
const int N = 3003;
int pref[N][N];
int query(int x1, int y1, int x2, int y2) {
  return pref[x2][y2] - pref[x2][y1-1] - pref[x1-1][y2] + pref[x1-1][y1-1];
}
int rectangle(int R, int C, int H, int W, int Q[3001][3001]) {
  	int l = 1, r = R*C;
  	while (l < r) {
      const int mid = (l+r+1)/2;
      for (int i = 1; i <= R; i++) {
        for (int j = 1; j <= C; j++) {
          pref[i][j] = Q[i-1][j-1] >= mid;
          pref[i][j] += pref[i][j-1];
        }
      }
      for (int i = 1; i <= R; i++) {
        for (int j = 1; j <= C; j++) {
          pref[i][j] += pref[i-1][j];
        }
      }
      int sum = 0;
      bool ok = false;
      for (int i = 1; i <= R-H+1; i++) {
        for (int j = 1; j <= C-W+1; j++) {
          if (query(i, j, i+H-1, j+W-1) >= H*W/2 + (H*W%2)) {
            ok = true;
          }
        }
      }
      if (ok)
        	l = mid;
      else
        	r = mid-1;
    }
  	return l;
}

Compilation message (stderr)

quality.cpp: In function 'int rectangle(int, int, int, int, int (*)[3001])':
quality.cpp:24:11: warning: unused variable 'sum' [-Wunused-variable]
   24 |       int sum = 0;
      |           ^~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20