Package g2301_2400.s2392_build_a_matrix_with_conditions

Class Solution

java.lang.Object

g2301_2400.s2392_build_a_matrix_with_conditions.Solution

public class Solution
extends Object

2392 - Build a Matrix With Conditions\. Hard You are given a **positive** integer `k`. You are also given: * a 2D integer array `rowConditions` of size `n` where rowConditions[i] = [abovei, belowi], and * a 2D integer array `colConditions` of size `m` where colConditions[i] = [lefti, righti]. The two arrays contain integers from `1` to `k`. You have to build a `k x k` matrix that contains each of the numbers from `1` to `k` **exactly once**. The remaining cells should have the value `0`. The matrix should also satisfy the following conditions: * The number abovei should appear in a **row** that is strictly **above** the row at which the number belowi appears for all `i` from `0` to `n - 1`. * The number lefti should appear in a **column** that is strictly **left** of the column at which the number righti appears for all `i` from `0` to `m - 1`. Return _**any** matrix that satisfies the conditions_. If no answer exists, return an empty matrix. **Example 1:**  **Input:** k = 3, rowConditions = \[\[1,2],[3,2]], colConditions = \[\[2,1],[3,2]] **Output:** [[3,0,0],[0,0,1],[0,2,0]] **Explanation:** The diagram above shows a valid example of a matrix that satisfies all the conditions. The row conditions are the following: - Number 1 is in row 1, and number 2 is in row 2, so 1 is above 2 in the matrix. - Number 3 is in row 0, and number 2 is in row 2, so 3 is above 2 in the matrix. The column conditions are the following: - Number 2 is in column 1, and number 1 is in column 2, so 2 is left of 1 in the matrix. - Number 3 is in column 0, and number 2 is in column 1, so 3 is left of 2 in the matrix. Note that there may be multiple correct answers. **Example 2:** **Input:** k = 3, rowConditions = \[\[1,2],[2,3],[3,1],[2,3]], colConditions = \[\[2,1]] **Output:** [] **Explanation:** From the first two conditions, 3 has to be below 1 but the third conditions needs 3 to be above 1 to be satisfied. No matrix can satisfy all the conditions, so we return the empty matrix. **Constraints:** * `2 <= k <= 400` * 1 <= rowConditions.length, colConditions.length <= 104 * `rowConditions[i].length == colConditions[i].length == 2` * 1 <= abovei, belowi, lefti, righti <= k * abovei != belowi * lefti != righti

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int[][]	buildMatrix(int k, int[][] rowC, int[][] colC)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

buildMatrix

public int[][] buildMatrix(int k,
 int[][] rowC,
 int[][] colC)