Submission #358467

#	Time	Username	Problem	Language	Result	Execution time	Memory
358467		idk321	Quality Of Living (IOI10_quality)	C++98	40 / 100	5062 ms	4460 KiB

quality

#include "quality.h"

#include <bits/stdc++.h>
using namespace std;



int r, c, h, w, q[3001][3001];
int add[301][301];
array<int, 2> pos [90001];



bool cont(int i, int j, int num)
{
    auto cpos = pos[num];
    if (i <= cpos[0] && cpos[0] <= i + h - 1 && cpos[1] >= j && cpos[1] <= j + w - 1) return true;
    return false;
}

bool good(int num)
{
    for (int i = 0; i + h - 1 < r; i++)
    {
        for (int j = 0; j + w - 1 < c; j++)
        {
            int sum = add[i + h - 1][j + w - 1];
            if (i != 0) sum -= add[i - 1][j + w - 1];
            if (j != 0) sum -= add[i  + h - 1][j - 1];
            if (i != 0 && j != 0) sum += add[i - 1][j - 1];
            if (sum >= (h * w - 1) / 2 && cont(i, j, num)) return true;
        }
    }

    return false;
}

void make(int num)
{

    for (int i = 0; i < r; i++)
    {
        for (int j = 0; j < c; j++) add[i][j] = 0;
    }

    for (int i = 0; i < r; i++)
    {
        for (int j = 0; j < c; j++)
        {
            if (q[i][j] <= num) add[i][j] = 1;
            if (i != 0) add[i][j] += add[i - 1][j];
            if (j != 0) add[i][j] += add[i][j - 1];
            if (i != 0 && j != 0) add[i][j] -= add[i - 1][j - 1];
        }
    }
}



int rectangle(int R, int C, int H, int W, int Q[3001][3001]) {
    r = R;
    c = C;
    h = H;
    w = W;
    for (int i = 0; i < 301; i++)
    {
        for (int j = 0; j < 301; j++) q[i][j] = Q[i][j];
    }

    for (int i = 0; i < r; i++)
    {
        for (int j = 0; j < c; j++)
        {
            pos[q[i][j]] = {i, j};
        }
    }

    for (int i = (h * w - 1) / 2 + 1; i <= r * c; i++)
    {
        make(i - 1);
        if (good(i)) return i;
    }

	return -1;
}

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