给定一个矩阵 A, 返回 A 的转置矩阵。
矩阵的转置是指将矩阵的主对角线翻转,交换矩阵的行索引与列索引。
示例 1:
输入:[[1,2,3],[4,5,6],[7,8,9]] 输出:[[1,4,7],[2,5,8],[3,6,9]]
示例 2:
输入:[[1,2,3],[4,5,6]] 输出:[[1,4],[2,5],[3,6]]
提示:
- 1 <= A.length <= 1000
- 1 <= A[0].length <= 1000
class Solution {
public:
vector<vector<int> > transpose(vector<vector<int> >& A) {
int r = A.size();
int c = A[0].size();
vector<vector<int> > res(c, vector<int>(r, 0));
for(int i = 0; i < r; i++)
{
for(int j = 0; j < c; j++)
{
res[j][i] = A[i][j];
}
}
return res;
}
};