Submission #1289418

#	Time	Username	Problem	Language	Result	Execution time	Memory
1289418		aren_dance	Quality Of Living (IOI10_quality)	C++20	100 / 100	1510 ms	106336 KiB

quality

#include <bits/stdc++.h>
#include "quality.h"
using namespace std;
const int N=3010;
int a[N][N];
int pref[N][N];
int n,m,w,h;
int range(int l1,int r1,int l2,int r2){
    return pref[l2][r2]-pref[l1-1][r2]-pref[l2][r1-1]+pref[l1-1][r1-1];
}
bool check(int x){
    for(int i=1;i<=n;++i){
        for(int j=1;j<=m;++j){
            pref[i][j]=0;
            pref[i][j]=pref[i][j-1]+pref[i-1][j]-pref[i-1][j-1];
            if(a[i][j]>x){
                pref[i][j]++;
            }
            else if(a[i][j]==x){
                
            }
            else{
                pref[i][j]--;
            }
        }
    }
    for(int i=1;i<=n-h+1;++i){
        for(int j=1;j<=m-w+1;++j){
            if(range(i,j,i+h-1,j+w-1)<=0){
                return 1;
            }
        }
    }
    return 0;
}
int rectangle(int R, int C, int H, int W, int q[3001][3001]) {
	n=R;
	m=C;
	h=H;
	w=W;
	for(int i=0;i<n;++i){
		for(int j=0;j<m;++j){
			a[i+1][j+1]=q[i][j];
		}
	}
	int l=1;
    int r=n*m;
    int answ;
    while(l<=r){
        int x=(l+r)/2;
        if(check(x)){
            r=x-1;
            answ=x;
        }
        else{
            l=x+1;
        }
    }
    return answ;
}

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