Submission #405685

#	Time	Username	Problem	Language	Result	Execution time	Memory
405685		Tc14	Rectangles (IOI19_rect)	C++17	37 / 100	2622 ms	1048580 KiB

rect

//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#include "rect.h"
using namespace std;
#define ve vector
typedef long long ll;
typedef pair<int, int> pii;
const int INF = 1e9 + 10;

ll count_rectangles(ve<ve<int>> A) {

    int n, m;
    ve<ve<ve<int>>> R, C;

    n = (int)A.size();
    m = (int)A[0].size();

    R = ve<ve<ve<int>>>(m, ve<ve<int>>(m, ve<int>(n, -1)));
    C = ve<ve<ve<int>>>(n, ve<ve<int>>(n, ve<int>(m, -1)));

    for (int i = 1; i < m - 1; i++) {
        ve<int> Max(n, 0);
        for (int j = i; j >= 1; j--) {

            int cnt = 0;
            for (int k = 1; k < n - 1; k++) {
                Max[k] = max(Max[k], A[k][j]);

                if (Max[k] < A[k][i + 1] && Max[k] < A[k][j - 1]) {
                    R[i][j][k] = cnt;
                }
                else cnt++;
            }
        }
    }

    for (int i = 1; i < n - 1; i++) {
        ve<int> Max(m, 0);
        for (int j = i; j >= 1; j--) {

            int cnt = 0;
            for (int k = 1; k < m - 1; k++) {
                Max[k] = max(Max[k], A[j][k]);

                if (Max[k] < A[i + 1][k] && Max[k] < A[j - 1][k]) {
                    C[i][j][k] = cnt;
                }
                else cnt++;
            }
        }
    }

    ll ans = 0;
    for (int i = 1; i < n - 1; i++) {
        for (int j = 1; j <= i; j++) {
            for (int k = 1; k < m - 1; k++) {
                for (int l = 1; l <= k; l++) {

                    int a = C[i][j][k];
                    int b = C[i][j][l];
                    int c = R[k][l][i];
                    int d = R[k][l][j];

                    if (a != -1 && b != -1 && c != -1 && d != -1) {
                        if (a == b && c == d) ans++;
                    }
                }
            }
        }
    }

	return ans;
}

• 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