Submission #152592

#	Time	Username	Problem	Language	Result	Execution time	Memory
152592		Myldero	Rectangles (IOI19_rect)	Java	37 / 100	5091 ms	28508 KiB

rect

class rect {

    int[][] a;
    int n, m;

    public boolean checkRectangle (int r1, int r2, int c1, int c2) {

        for (int i = r1; i <= r2; i++) {
            for (int j = c1; j <= c2; j++) {
                int t = a[i][j];
                if (a[i][c1-1] <= t || a[i][c2+1] <= t ||
                    a[r1-1][j] <= t || a[r2+1][j] <= t) return false;
            }
        }

        return true;
    }

    public long count_rectangles(int[][] A) {
        a = A;

        n = a.length;
        m = a[0].length;

        long sum = 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++) {

                        if (checkRectangle(r1, r2, c1, c2)) sum++;

                    }
                }
            }
        }

        return sum;
    }
}

• 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