LeetCode刷题笔记--867. Transpose Matrix

867. Transpose Matrix

Easy

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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

这道题比较简单，直接贴答案

class Solution {
public:
    vector<vector<int>> transpose(vector<vector<int>>& A) {
        vector<vector<int>> ans;
        ans.clear();
        vector<int> temp;
        for(int i=0;i<A[0].size();i++)
        {
            for(int j=0;j<A.size();j++)
            {
                temp.push_back(A[j][i]);
            }
            ans.push_back(temp);
            temp.clear();
        }
        return ans;
    }
};