Cloumn Wave all test case failed after compiling correct

#1

It gives the correct output when compile but throwing error while submitting

Scanner s = new Scanner(System.in);
int m = s.nextInt();
int n = s.nextInt();

	int[][] arr = new int[m][n];
	
	for (int i = 0; i < m; i++) {
		
		for (int j = 0; j < n; j++) {
			arr[i][j] = s.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.println("END");
#2

Hey @danyalkhan8271 Very sorry for the late reply but I was not feeling well. So The problem with your code is : in the part below you need to change i with j and j with i bcoz you are using ar[j][i] but constraints given to i are of rows but you have sent it in the place of columns.so swap i and j in the this part;
for (int i = 0; i < m; i++) {

if(i % 2 == 0) {

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

            System.out.print(arr[i][j] + ", ");

}

}else {

for(int j = n-1; j >= 0; j–) {

            System.out.print(arr[i][j] + ", ");

}

}

}

#3

if i swap i with j in this part it will not print the same pattern, as given in question…

#4

@danyalkhan8271 Yeah and that means you need to change your logic a little bit.

#5

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