제출 #261137

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
261137		idk321	Rectangles (IOI19_rect)	Java	0 / 100	2905 ms	1048576 KiB

rect

import java.util.Arrays;

class rect {
	boolean[][] visited;

	public long count_rectangles(int[][] a) {
		int n = a.length;
		int m = a[0].length;

		if (n <= 2 || m <= 2) return 0;

		boolean allZeroAndOne = true;
		for (int i = 0; i < n; i++) for (int j = 0; j < m; j++) if (a[i][j] != 0 && a[i][j] != 1) allZeroAndOne = false;

		if (n <= 3) {
			int currLength = 0;
			int goodStarts = 0;
			long res = 0;
			for (int i = 1; i < m - 1; i++) {
				int h = a[1][i];
				if (a[0][i] <= h || a[2][i] <= h) {
					goodStarts = 0;
				} else {
					if (a[1][i - 1] > h) goodStarts++;
					if (a[1][i + 1] > h) res += goodStarts;
				}
			}

			return res;
		/*} else if (allZeroAndOne) {
			visited = new boolean[n][m];
			Arrays.fill(visited[0], true);
			Arrays.fill(visited[n - 1], true);
			for (int i = 0; i < n; i++) {
				visited[i][0] = true;
				visited[i][m - 1] = true;
			}
			for (int i = 1; i < n - 1; i++) {
				for (int j = 1; j < m - 1; j++) {

				}
			} */
		} else {
			int[][][] maxRight = new int[n][m][m];
			for (int i = 1; i < n - 1; i++) {
				for (int j = 1; j < m - 1; j++) {
					for (int k = j; k < m - 1; k++) {
						if (j == k) {
							maxRight[i][j][k] = a[i][j];
						} else {
							maxRight[i][j][k] = Math.max(a[i][k], maxRight[i][j][k - 1]);
						}
					}
				}
			}
			int[][][] maxDown = new int[m][n][n];
			for (int j = 1; j < m - 1; j++) {
				for (int i = 1; i < n - 1; i++) {
					for (int k = i; k < n - 1; k++) {
						if (i == k) {
							maxDown[j][i][k] = a[i][j];
						} else {
							maxDown[j][i][k] = Math.max(a[k][j], maxDown[j][i][k - 1]);
						}
					}
				}
			}



			long rect = 0;
			for (int i = 1; i < n - 1; i++) {
				for (int j = 1; j < m - 1; j++) {
					for (int k = i; k < n - 1; k++) {
						for (int l = j; l < m - 1; l++) {
							if (maxDown[l][i][k] >= a[i - 1][l] || maxDown[l][i][k] >= a[k + 1][l]) break;

							boolean shouldBreak = false;
							boolean possible = true;
							for (int o = i; o <= k; o++) {
								if (a[o][l] >= a[o][j - 1]) {
									shouldBreak = true;
									break;
								}
								if (maxRight[o][j][l] >= a[o][l + 1]) {
									possible = false;
									break;
								}
							}
							if (shouldBreak) break;

							if (possible) {
								//System.out.println(i + " " + j + " " +  k + " " + l);
								rect++;
							}
						}
					}
				}
			}
			//System.out.println(Arrays.deepToString(maxDown));
			//System.out.println(Arrays.deepToString(rightOk));
			//System.out.println(maxDown[1][1][1]);

			return rect;
		}
	}

}

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