Submission #236524

#	Time	Username	Problem	Language	Result	Execution time	Memory
236524		nicolaalexandra	Quality Of Living (IOI10_quality)	C++14	100 / 100	3981 ms	125076 KiB

quality

#include <bits/stdc++.h>
#include "quality.h"
#define DIM 3001
using namespace std;

int sp[DIM][DIM],v[DIM*DIM];

int verif (int n, int m, int h, int w, int a[3001][3001], int val){
    int i,j;
    for (i=1;i<=n;i++)
        for (j=1;j<=m;j++)
            sp[i][j] = 0;

    for (i=1;i<=n;i++)
        for (j=1;j<=m;j++){
            sp[i][j] = sp[i-1][j] + sp[i][j-1] - sp[i-1][j-1];
            if (a[i-1][j-1] <= val)
                sp[i][j]++;
        }

    for (i=1;i<=n-h+1;i++)
        for (j=1;j<=m-w+1;j++){
            int sum = sp[i+h-1][j+w-1] - sp[i+h-1][j-1] - sp[i-1][j+w-1] + sp[i-1][j-1];
            if (sum >= h*w / 2 + 1)
                return 1;
        }

    return 0;
}

int rectangle (int n, int m, int h, int w, int a[3001][3001]){

    int k = 0;
    for (int i=0;i<n;i++)
        for (int j=0;j<m;j++)
            v[++k] = a[i][j];

    sort (v+1,v+k+1);

    int st = 1, dr = n*m, sol = 0;
    while (st <= dr){
        int mid = (st+dr)>>1;
        if (verif(n,m,h,w,a,v[mid])){
            sol = v[mid];
            dr = mid-1;
        } else st = mid+1;
    }

    return sol;

}

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