Column wise matrix not submitting

#1

why my code is not submitting

import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
int M=sc.nextInt();
int N=sc.nextInt();

int[][] arr=new int[M][N];
for(int i=0;i<M;i++)
{
	for(int j=0;j<N;j++)
	{
		arr[i][j]=sc.nextInt();
	}
}


for(int i=0;i<M;i++)
{
	if(i%2==0)
	{
		for(int j=0;j<N;j++)
		{
			System.out.print(arr[j][i]+", ");
		}
	}
	else
	{
		for(int j=N-1;j>=0;j--)
		{
			System.out.print(arr[j][i]+", ");
		}
	}
}
System.out.print("END");

}
}

#2

@Avnish-Singh-2724104534303277,

https://ide.codingblocks.com/s/251268 corrected code buddy. There was an error in your input format. There were 2 variables for input, you took only one.

#3

but sir i have taken two inputs M & N bt my code was nt working.

#4

@Avnish-Singh-2724104534303277,

https://ide.codingblocks.com/s/251289 corrected code.
You had interchanged M and N in your approach while printing the elements.
That way you would have got a outofbounds error for the input:

2 3
1 2 3
4 5 6

Also, I took the code from your most recent submission before checking it. In that you had written int N=M. Hence the misjudgment.

Anyway, I hope this helps. :smile:

#5

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