Submission #538739

#	Time	Username	Problem	Language	Result	Execution time	Memory
538739		joshualiu555	Quality Of Living (IOI10_quality)	C++17	100 / 100	1956 ms	83868 KiB

quality

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

using namespace std;

#define FOR(i, x, n) for (int i = x; i <= n; i++)
#define mem(a, x) memset(a, x, sizeof(a))

bool check(int R, int C, int H, int W, int Q[3001][3001], int median) {
    int ps[3001][3001];
    mem(ps, 0);

    FOR(i, 1, R) {
        FOR(j, 1, C) {
            if (Q[i - 1][j - 1] <= median) {
                ps[i][j] = 1;
            } else {
                ps[i][j] = -1;
            }
        }
    }

    FOR(i, 1, R) {
        FOR(j, 1, C) {
            ps[i][j] += ps[i][j - 1] + ps[i - 1][j] - ps[i - 1][j - 1];
        }
    }

    FOR(i, H, R) {
        FOR(j, W, C) {
            if (ps[i][j] - ps[i - H][j] - ps[i][j - W] + ps[i - H][j - W] > 0) {
                return true;
            }
        }
    }

    return false;
}

int rectangle(int R, int C, int H, int W, int Q[3001][3001]) {
    int ans = -1;
    int l = 1, r = R * C;
    while (l <= r) {
        int m = (l + r) / 2;
        if (check(R, C, H, W, Q, m)) {
            ans = m;
            r = m - 1;
        } else {
            l = m + 1;
        }
    }

    return ans;
}

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