Wave Print Column-Wise

#1

My output is equivalent to the desired output. However on submitting,none of the test cases succeed.

My code :
#include
using namespace std;
int main() {
int m,n;
cin>>m>>n;
int arr[m][n];
for(int i=0; i<m; i++){
for(int j=0; j<n; j++){
cin>>arr[i][j];
}
}

for(int j=0; j<n; j++){
	if(j%2==0){
		for(int i=0; i<m; i++){
			cout<<arr[i][j]<<", ";
		}
	}
	else{
		for(int i=n-1; i>=0; i--){
			cout<<arr[i][j]<<", ";
		}
	}
}
cout<<"END";
return 0;

}

#2

Hello @gptradhika1208,

Mistake:
for(int i=n-1; i>=0; i–){
Solution:
It should be m-1 instead of n-1.

Hope, this would help.

#3

Yes,it worked. Thanks

#4

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