Submission #229151

#	Time	Username	Problem	Language	Result	Execution time	Memory
229151		thtsshz_bgwrswh	Quality Of Living (IOI10_quality)	C++17	100 / 100	3610 ms	106312 KiB

quality

#pragma GCC optimize("Ofast")
#include<stdio.h>
#include<algorithm>
using namespace std;
int r,c,h,w,num[3005][3005],pre[3005][3005];
bool check(int v){
	int i,j;
	for(i=0;i<r;i++){
		for(j=0;j<c;j++){
			if(num[i][j]<v)
				pre[i][j]=1;
			else if(num[i][j]==v)
				pre[i][j]=0;
			else
				pre[i][j]=-1; 
		}
	}
	for(i=0;i<r;i++)
		for(j=0;j<c;j++)
			pre[i][j]+=(j?pre[i][j-1]:0)+(i?pre[i-1][j]:0)-((i&&j)?pre[i-1][j-1]:0);
	for(i=0;i<=r-h;i++)
		for(j=0;j<=c-w;j++)
			if(pre[i+h-1][j+w-1]+((i&&j)?pre[i-1][j-1]:0)-(j?pre[i+h-1][j-1]:0)-(i?pre[i-1][j+w-1]:0)>=0)
				return 1;
	return 0;
}
int rectangle(int R,int C,int H,int W,int Q[3001][3001]){
	r=R;
	c=C;
	h=H;
	w=W;
	int i,j,right=r*c+1,left=0;
	for(i=0;i<r;i++)
		for(j=0;j<c;j++)
			num[i][j]=Q[i][j];
	while(right-left>1){
		int mid=(right+left)>>1;
		if(check(mid))
			right=mid;
		else
			left=mid;		
	}
	return right;
}

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