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package LeetCode.array;

/**

* Rotate Image;先上下对调，再沿折线（\）对调；或左右对调，在沿反折线（/)对调

*/

public class LeetCode48 {

public void rotate(int[][] matrix) {

matrix = swap(matrix);

int n = matrix.length;

for(int i = 0; i < n; i++){

for(int j = i+1; j < n; j++){

int temp = matrix[i][j];

matrix[i][j] = matrix[j][i];

matrix[j][i] = temp;

}

}

}

private int[][] swap(int[][] matrix){

int n = matrix.length;

for(int i = 0; i < n/2; i++){

int[] temp = matrix[i];

matrix[i] = matrix[n-i-1];

matrix[n-i-1] = temp;

}

return matrix;

}

}