Submission #357608

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
357608	2021-01-24T08:56:37 Z	Mefarnis	Quality Of Living (IOI10_quality)	C++14	Compilation error	0 ms	0 KB

quality

#include <bits/stdc++.h>
#include "quality.h"
#include "grader.h"
#define maxn 3001
using namespace std;

int sum[maxn][maxn];

int rectangle(int n, int m, int h, int w, int ar[][5]) {
	int N = n*m , ans;
	int l = 1 , r = N;
	while(l <= r) {
		int mid = (l+r) >> 1;
		memset(sum,0,sizeof(sum));
		for( int i = 1 ; i <= n ; i++ )
			for( int j = 1 ; j <= m ; j++ ) {
				int add = (ar[i-1][j-1] <= mid) ? +1 : -1;
				sum[i][j] = sum[i-1][j] + sum[i][j-1] - sum[i-1][j-1] + add;
			}
		bool ok = false;
		for( int row = h ; row <= n ; row++ )
			for( int col = w ; col <= m ; col++ ) {
				int total = sum[row][col] - sum[row-h][col] - sum[row][col-w] + sum[row-h][col-w];
				if(total > 0)
					ok = true;
			}
		if(ok)
			ans = mid , r = mid-1;
		else
			l = mid+1;
	}
	return ans;
}

Compilation message

quality.cpp: In function 'int rectangle(int, int, int, int, int (*)[5])':
quality.cpp:32:9: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   32 |  return ans;
      |         ^~~
/tmp/ccMrkJyQ.o: In function `main':
grader.cpp:(.text.startup+0xe9): undefined reference to `rectangle(int, int, int, int, int (*) [3001])'
collect2: error: ld returned 1 exit status