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0Wipro NTH Coding Sample Question- 2
PrepSter Wipro NTH Coding Question – 2
Print a given matrix in spiral form
Ques: Given a 2D array, print it in spiral form. See the following examples.
NOTE:- Please comment down the code in other languages as well below .
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
Input:
1 2 3 4 5 6
7 8 9 10 11 12
13 14 15 16 17 18
Output:
1 2 3 4 5 6 12 18 17 16 15 14 13 7 8 9 10 11 C
C++
JAVA
Python
C
Run
#include <stdio.h>
#define R 3
#define C 6
void spiralPrint (int m, int n, int a[R][C])
{
int i, k = 0, l = 0;
/* k - starting row index
m - ending row index
l - starting column index
n - ending column index
i - iterator
*/
while (k < m && l < n)
{
/* Print the first row from the remaining rows */
for (i = l; i < n; ++i)
{
printf ("%d ", a[k][i]);
}
k++;
/* Print the last column from the remaining columns */
for (i = k; i < m; ++i)
{
printf ("%d ", a[i][n - 1]);
}
n--;
/* Print the last row from the remaining rows */
if (k < m)
{
for (i = n - 1; i >= l; --i)
{
printf ("%d ", a[m - 1][i]);
}
m--;
}
/* Print the first column from the remaining columns */
if (l < n)
{
for (i = m - 1; i >= k; --i)
{
printf ("%d ", a[i][l]);
}
l++;
}
}
}
/* Driver program to test above functions */
int main ()
{
int a[R][C] = { {1, 2, 3, 4, 5, 6},
{7, 8, 9, 10, 11, 12},
{13, 14, 15, 16, 17, 18}
};
spiralPrint (R, C, a);
return 0;
}C++
Run
#include <bits/stdc++.h>
using namespace std;
#define R 3
#define C 6
void spiralPrint(int m, int n, int a[R][C])
{
int i, k = 0, l = 0;
/* k - starting row index
m - ending row index
l - starting column index
n - ending column index
i - iterator
*/
while (k < m && l < n) {
/* Print the first row from
the remaining rows */
for (i = l; i < n; ++i) {
cout << a[k][i] << " ";
}
k++;
/* Print the last column
from the remaining columns */
for (i = k; i < m; ++i) {
cout << a[i][n - 1] << " ";
}
n--;
/* Print the last row from
the remaining rows */
if (k < m) { for (i = n - 1; i >= l; --i) {
cout << a[m - 1][i] << " ";
}
m--;
}
/* Print the first column from
the remaining columns */
if (l < n) { for (i = m - 1; i >= k; --i) {
cout << a[i][l] << " ";
}
l++;
}
}
}
/* Driver program to test above functions */
int main()
{
int a[R][C] = { { 1, 2, 3, 4, 5, 6 },
{ 7, 8, 9, 10, 11, 12 },
{ 13, 14, 15, 16, 17, 18 } };
spiralPrint(R, C, a);
return 0;
}
JAVA
Run
import java.io.*;
class Main
{
// Function print matrix in spiral form
static void spiralPrint (int m, int n, int a[][])
{
int i, k = 0, l = 0;
/* k - starting row index
m - ending row index
l - starting column index
n - ending column index
i - iterator
*/
while (k < m && l < n)
{
// Print the first row from the remaining rows
for (i = l; i < n; ++i)
{
System.out.print (a[k][i] + " ");
}
k++;
// Print the last column from the remaining columns
for (i = k; i < m; ++i)
{
System.out.print (a[i][n - 1] + " ");
}
n--;
// Print the last row from the remaining rows */
if (k < m)
{
for (i = n - 1; i >= l; --i)
{
System.out.print (a[m - 1][i] + " ");
}
m--;
}
// Print the first column from the remaining columns */
if (l < n)
{
for (i = m - 1; i >= k; --i)
{
System.out.print (a[i][l] + " ");
}
l++;
}
}
}
// driver program
public static void main (String[]args)
{
int R = 3;
int C = 6;
int a[][] = { {1, 2, 3, 4, 5, 6},
{7, 8, 9, 10, 11, 12},
{13, 14, 15, 16, 17, 18}
};
spiralPrint (R, C, a);
}
}Python
Run
def spiralOrder(arr):
ans=[]
while arr:
ans+=arr.pop(0)
arr= (list(zip(*arr)))[::-1]
return ans
arr=[[1, 2, 3, 4, 5, 6],[7, 8, 9, 10, 11, 12],[13, 14, 15, 16, 17, 18]]
print(spiralOrder(arr))Get over 200+ course One Subscription
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