leetcode 566. 重塑矩阵（Java版，坐标转换）

红太狼 2022-10-16 06:13 171阅读 0赞

## 题目 ##

[https://leetcode-cn.com/problems/reshape-the-matrix/][https_leetcode-cn.com_problems_reshape-the-matrix]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzQyNDgzMzQx_size_16_color_FFFFFF_t_70]

## 题解 ##

草稿是将 `3*4` 矩阵转化为 `4*3` 矩阵的例子：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzQyNDgzMzQx_size_16_color_FFFFFF_t_70 1]

做完之后发现思路与官方题解一致，直接贴官方题解吧。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzQyNDgzMzQx_size_16_color_FFFFFF_t_70 2]

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

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzQyNDgzMzQx_size_16_color_FFFFFF_t_70 3]

[https_leetcode-cn.com_problems_reshape-the-matrix]: https://leetcode-cn.com/problems/reshape-the-matrix/
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzQyNDgzMzQx_size_16_color_FFFFFF_t_70]: /images/20221014/8b3f6f45905d42e59a35371ffa37f6ca.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzQyNDgzMzQx_size_16_color_FFFFFF_t_70 1]: /images/20221014/d88651c9dd2c40018ccf969eb363bfa0.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzQyNDgzMzQx_size_16_color_FFFFFF_t_70 2]: /images/20221014/c90b7ed418764b608978a3dcb51ef458.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NpbmF0XzQyNDgzMzQx_size_16_color_FFFFFF_t_70 3]: /images/20221014/59aa216bc7f84720a5286c7975ac7e5d.png