Submission #595639

#	Time	Username	Problem	Language	Result	Execution time	Memory
595639		Bench0310	Quality Of Living (IOI10_quality)	C++17	100 / 100	1641 ms	139996 KiB

quality

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

int rectangle(int n,int m,int h,int w,int a[3001][3001])
{
    int l=0,r=n*m;
    int s[n+1][m+1];
    memset(s,0,sizeof(s));
    while(l<r-1)
    {
        int lim=(l+r)/2;
        for(int i=1;i<=n;i++) for(int j=1;j<=m;j++) s[i][j]=s[i-1][j]+s[i][j-1]-s[i-1][j-1]+(a[i-1][j-1]<=lim);
        bool ok=0;
        for(int i=h;i<=n;i++) for(int j=w;j<=m;j++) ok|=(s[i][j]-s[i-h][j]-s[i][j-w]+s[i-h][j-w]>=(h*w+1)/2);
        if(ok) r=lim;
        else l=lim;
    }
    return r;
}

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