# 867. Transpose Matrix

Given a matrix `A`, return the transpose of `A`.

The transpose of a matrix is the matrix flipped over it’s main diagonal, switching the row and column indices of the matrix.

Example 1:

``````Input: [[1,2,3],[4,5,6],[7,8,9]]
Output: [[1,4,7],[2,5,8],[3,6,9]]
``````

Example 2:

``````Input: [[1,2,3],[4,5,6]]
Output: [[1,4],[2,5],[3,6]]
``````

Note:

1. `1 <= A.length <= 1000`
2. `1 <= A[0].length <= 1000`

``````class Solution {
public:
vector<vector<int>> transpose(vector<vector<int>>& A) {
int m = A.size(), n = A[0].size();
vector<vector<int>> res(n, vector<int>(m));
for (int i = 0; i < m; ++i) {
for (int j = 0; j < n; ++j) {
res[j][i] = A[i][j];
}
}
return res;
}
};
``````

Github 同步地址:

https://github.com/grandyang/leetcode/issues/867

https://leetcode.com/problems/transpose-matrix/

https://leetcode.com/problems/transpose-matrix/discuss/146797/C%2B%2BJavaPython-Easy-Understood

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