Submission #1017912

#	Time	Username	Problem	Language	Result	Execution time	Memory
1017912		socpite	Quality Of Living (IOI10_quality)	C++14	100 / 100	1440 ms	140080 KiB

quality

#include "quality.h"
#include<iostream>
using namespace std;

const int maxn = 3e3+5;

int pfx[maxn][maxn];

int rectangle(int R, int C, int H, int W, int Q[3001][3001]) {
	int l = 1, r = R*C;
	while(l < r){
		int mid = (l+r)>>1;
		bool found = 0;
		for(int i = 1; i <= R; i++){
			for(int j = 1; j <= C; j++){
				pfx[i][j] = pfx[i-1][j] + pfx[i][j-1] - pfx[i-1][j-1] + (Q[i-1][j-1] <= mid);
				if(i >= H && j >= W && pfx[i][j] - pfx[i-H][j] - pfx[i][j-W] + pfx[i-H][j-W] > H*W/2){
					found = 1;
				}
			}
		}
		if(found)r = mid;
		else l = mid+1;
	}
	return l;
}

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