Submission #972041

#	Time	Username	Problem	Language	Result	Execution time	Memory
972041		opPO	Rectangles (IOI19_rect)	C++14	37 / 100	5054 ms	22876 KiB

rect

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

#define sz(x) (int)x.size()

using namespace std;

long long count_rectangles(vector<vector<int>> a) {
    int n = sz(a);
    int m = sz(a[0]);

    if (n <= 2 || m <= 2) {
        return 0;
    }
    if (n == 3) {
        long long res = 0;
        for (int l = 0; l < m; l++) {
            int mx = -1e9;
            for (int r = l + 1; r < m; r++) {
                if (r - l > 1 && mx < a[1][l] && mx < a[1][r]) {
                    res++;
                }
                if (a[1][r] >= a[0][r] || a[1][r] >= a[2][r]) break;
                mx = max(mx, a[1][r]);
            }
        }

        return res;
    }

    long long res = 0;
    for (int r1 = 1; r1 < n - 1; r1++) {
        for (int r2 = r1; r2 < n - 1; r2++) {
            for (int c1 = 1; c1 < m - 1; c1++) {
                for (int c2 = c1; c2 < m - 1; c2++) {
                    bool ok = 1;

                    for (int i = r1; i <= r2; i++) {
                        if (!ok) break;
                        for (int j = c1; j <= c2; j++) {
                            if (a[i][j] >= a[r1 - 1][j] || a[i][j] >= a[r2 + 1][j]
                                || a[i][j] >= a[i][c1 - 1] || a[i][j] >= a[i][c2 + 1]) {
                                ok = 0;
                                break;
                            }
                        }
                    }

                    res += ok;
                }
            }
        }
    }

    assert(res <= 1ll * n * m);

    return res;
}

/*
g++ -std=gnu++14 -O2 -Wall -pipe -static -o "rect" "grader.cpp" "rect.cpp"
*/

• Subtask 1: 8 / 8
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 0 / 22
• Subtask 5: 10 / 10
• Subtask 6: 0 / 13
• Subtask 7: 0 / 28