Problem Statement:
Input:
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
Output:
Input:
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
Output:
1, 2, 3, 4, 8, 12, 16, 15, 14, 13, 9, 5, 6, 7, 11, 10
Solution in Java:
public class MatrixSpiralParser {
public static void main(String[] args) {
int[][] matrix = new int[][]{ {1,2,3,4}, {5,6,7,8}, {9, 10, 11, 12}, {13,14,15,16}};
parseSprialWay(matrix);
}
private static void parseSprialWay(int[][] matrix) {
int startRow = 0;
int endRow = matrix.length - 1;
int startColumn = 0;
int endColumn = matrix[endRow-1].length -1;
while(startRow <= endRow && startColumn <= endColumn) {
for(int i = startColumn ; i <= endColumn ; i++) {
System.out.print(matrix[startRow][i] + ", ");
}
startRow++;
for(int i= startRow; i<= endRow; i++) {
System.out.print(matrix[i][endColumn] + ", ");
}
endColumn--;
for(int i = endColumn; i >= startColumn ; i--) {
System.out.print(matrix[endRow][i] + ", ");
}
endRow--;
for(int i= endRow; i >= startRow ; i-- ) {
System.out.print(matrix[i][startColumn] + ", ");
}
startColumn++;
}
}
}
