Submission #775728

#	Time	Username	Problem	Language	Result	Execution time	Memory
775728		DobromirAngelov	Quality Of Living (IOI10_quality)	C++14	0 / 100	1 ms	468 KiB

quality

#include<bits/stdc++.h>
#include "quality.h"

using namespace std;

const int MAXN=3005;

int n,m;
int h,w;
int half;
int pref[MAXN][MAXN];

bool check(int x,int q[][3001])
{
    pref[0][0]=0;
    int numX=-1, numY=-1;
    for(int i=0;i<n;i++)
    {
        for(int j=0;j<m;j++)
        {
            if(q[i][j]==x) numX=i, numY=j;
            if(i>0 && j>0) pref[i][j]=pref[i-1][j]+pref[i][j-1]-pref[i-1][j-1];
            else if(i>0) pref[i][j]=pref[i-1][j];
            else if(j>0) pref[i][j]=pref[i][j-1];
            if(q[i][j]<x) pref[i][j]++;

            if(i>=h-1 && j>=w-1)
            {
                int a1=0,a2=0,b=0;
                if(i>=h) a1=pref[i-h][j];
                if(j>=w) a2=pref[i][j-w];
                if(i>=h && j>=w) b=pref[i-h][j-w];
                if(pref[i][j]-a1-a2+b>=half && (i-h<numX && numX<=i && j-w<=numY && numY<=j)) 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;
    half=h*w/2;
    int l=1,r=n*m;
    while(l<r)
    {
        int mid=(l+r)/2;
        if(check(mid,q)) r=mid;
        else l=mid+1;
    }

    return l;
}

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