#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=0;i<m;i++)
cout<<a[i][j]<<",";
}else{
for(int i=m-1;i>=0;i--)
cout<<a[i][j]<<",";
}
}cout<<"END";
return 0;
}
sir why this code is showing wrong answer in each test cases here
although it is giving correct output in code blocks