Algorithms/JavaAlgorithms
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github-actions 2021-09-20 18:50:09 +00:00
parent dc2d3d3ff8
commit e72d71c0d7
1 changed files with 41 additions and 52 deletions
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21
Others/RotateMatriceBy90Degree.java
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@ -1,12 +1,9 @@
package Others; package Others;
/** /**
* Given a matrix of size n x n * Given a matrix of size n x n We have to rotate this matrix by 90 Degree Here is the algorithm for
* We have to rotate this matrix by 90 Degree * this problem .
* Here is the algorithm for this problem .
*
*/ */
import java.util.*; import java.util.*;
class Rotate_by_90_degree { class Rotate_by_90_degree {
@ -18,31 +15,24 @@ class Rotate_by_90_degree {
int n = sc.nextInt(); int n = sc.nextInt();
int[][] arr = new int[n][n]; int[][] arr = new int[n][n];
for (int i = 0; i < n; i++) for (int i = 0; i < n; i++) for (int j = 0; j < n; j++) arr[i][j] = sc.nextInt();
for (int j = 0; j < n; j++)
arr[i][j] = sc.nextInt();
Rotate g = new Rotate(); Rotate g = new Rotate();
g.rotate(arr); g.rotate(arr);
printMatrix(arr); printMatrix(arr);
} }
sc.close(); sc.close();
} }
static void printMatrix(int arr[][]) { static void printMatrix(int arr[][]) {
for (int i = 0; i < arr.length; i++) { for (int i = 0; i < arr.length; i++) {
for (int j = 0; j < arr[0].length; j++) for (int j = 0; j < arr[0].length; j++) System.out.print(arr[i][j] + " ");
System.out.print(arr[i][j] + " ");
System.out.println(""); System.out.println("");
} }
} }
} }
/** /** Class containing the algo to roate matrix by 90 degree */
* Class containing the algo to roate matrix by 90 degree
*/
class Rotate { class Rotate {
static void rotate(int a[][]) { static void rotate(int a[][]) {
int n = a.length; int n = a.length;
@ -66,6 +56,5 @@ class Rotate {
i++; i++;
k--; k--;
} }
} }
} }