Challenges-array Q2

sir my code is running correctly but it is giving wrong answer here

#include
using namespace std;
int main()
{
int m,n;
cin>>m>>n;
int a[m][n];
for(int i=0;i<m;i++)
{
for(int j=0;j<n;j++)
{
cin>>a[i][j];
}
}
for(int j=0;j<n;j++)
{
if(j%2!=0)
{
for(int i=m-1;i>=0;iā€“)
{
cout<<" ā€œ<<a[i][j]<<ā€,";
}
}
else{

		for(int i=0;i<n;i++)
		{
			cout<<" "<<a[i][j]<<",";
		}
		}
	}
	cout<<"END"<<endl;
}

plz save your code at
ide.codingblocks.com and share the link generated here