Package g1201_1300.s1253_reconstruct_a_2_row_binary_matrix

Class Solution

java.lang.Object

g1201_1300.s1253_reconstruct_a_2_row_binary_matrix.Solution

public class Solution
extends Object

1253 - Reconstruct a 2-Row Binary Matrix.<p>Medium</p> <p>Given the following details of a matrix with <code>n</code> columns and <code>2</code> rows :</p> <ul> <li>The matrix is a binary matrix, which means each element in the matrix can be <code>0</code> or <code>1</code>.</li> <li>The sum of elements of the 0-th(upper) row is given as <code>upper</code>.</li> <li>The sum of elements of the 1-st(lower) row is given as <code>lower</code>.</li> <li>The sum of elements in the i-th column(0-indexed) is <code>colsum[i]</code>, where <code>colsum</code> is given as an integer array with length <code>n</code>.</li> </ul> <p>Your task is to reconstruct the matrix with <code>upper</code>, <code>lower</code> and <code>colsum</code>.</p> <p>Return it as a 2-D integer array.</p> <p>If there are more than one valid solution, any of them will be accepted.</p> <p>If no valid solution exists, return an empty 2-D array.</p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> upper = 2, lower = 1, colsum = [1,1,1]</p> <p><strong>Output:</strong> [[1,1,0],[0,0,1]]</p> <p><strong>Explanation:</strong> [[1,0,1],[0,1,0]], and [[0,1,1],[1,0,0]] are also correct answers.</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> upper = 2, lower = 3, colsum = [2,2,1,1]</p> <p><strong>Output:</strong> []</p> <p><strong>Example 3:</strong></p> <p><strong>Input:</strong> upper = 5, lower = 5, colsum = [2,1,2,0,1,0,1,2,0,1]</p> <p><strong>Output:</strong> [[1,1,1,0,1,0,0,1,0,0],[1,0,1,0,0,0,1,1,0,1]]</p> <p><strong>Constraints:</strong></p> <ul> <li><code>1 <= colsum.length <= 10^5</code></li> <li><code>0 <= upper, lower <= colsum.length</code></li> <li><code>0 <= colsum[i] <= 2</code></li> </ul>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
List<List<Integer>>	reconstructMatrix(int upper, int lower, int[] colsum)

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

reconstructMatrix

public List<List<Integer>> reconstructMatrix(int upper,
 int lower,
 int[] colsum)