You are given an n x n 2D matrix representing an image.
Rotate the image by 90 degrees (clockwise).
Follow up:
Could you do this in-place?
class Solution {
public:
void rotate(vector<vector<int> > &matrix) {
int n=matrix.size();
vector<vector<int>> newm;
vector<int> v;
for(int i=0;i<n;i++)
{
v.clear();
for(int j=0;j<n;j++)
v.push_back(matrix[n-j-1][i]);
newm.push_back(v);
}
matrix= newm;
}
};
public:
void rotate(vector<vector<int> > &matrix) {
int n=matrix.size();
vector<vector<int>> newm;
vector<int> v;
for(int i=0;i<n;i++)
{
v.clear();
for(int j=0;j<n;j++)
v.push_back(matrix[n-j-1][i]);
newm.push_back(v);
}
matrix= newm;
}
};