題目

In MATLAB, there is a very useful function called 'reshape', which can reshape a matrix into a new one with different size but keep its original data.

You're given a matrix represented by a two-dimensional array, and two positive integers r and c representing the row number and column number of the wanted reshaped matrix, respectively.

The reshaped matrix need to be filled with all the elements of the original matrix in the same row-traversing order as they were.

If the 'reshape' operation with given parameters is possible and legal, output the new reshaped matrix; Otherwise, output the original matrix.

Example 1:

Input: nums = [[1,2],[3,4]] r = 1, c = 4 Output: [[1,2,3,4]] Explanation: The row-traversing of nums is [1,2,3,4]. The new reshaped matrix is a 1 * 4 matrix, fill it row by row by using the previous list.

Example 2:

Input: nums = [[1,2],[3,4]] r = 2, c = 4 Output: [[1,2],[3,4]] Explanation: There is no way to reshape a 2 * 2 matrix to a 2 * 4 matrix. So output the original matrix.

Note:

The height and width of the given matrix is in range [1, 100].

The given r and c are all positive.

題目地址

講解

二維數(shù)組，重新堆疊的問題。

java代碼

class Solution {public int[][] matrixReshape(int[][] nums, int r, int c) {if(nums.length*nums[0].length != r*c){return nums;}else{int[][] result = new int[r][c];for(int i=0;i<r;i++){for(int j=0;j<c;j++){int sum = i*c+j;int row = sum/nums[0].length;int column = sum%nums[0].length;result[i][j] = nums[row][column];}} return result;}} }

總結(jié)

以上是生活随笔為你收集整理的leetcode讲解--566. Reshape the Matrix的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯(cuò)，歡迎將生活随笔推薦給好友。