Test case failed

#1

#include
using namespace std;
int main() {
int arr[10][10]={0};
int M,N;
cin>>M>>N;
for(int i=0;i<M;i++)
{
for(int j=0;j<N;j++)
{
cin>>arr[i][j];
}
}
int i=0;
int j=0;
while(j<N)
{
while(i<M)
{
cout<<arr[i][j]<<", “;
i++;
}
j++;
i–;
while(i>=0)
{
cout<<arr[i][j]<<”, ";
i–;
}
j++;
i++;
}
cout<<“END”;
return 0;
}
how should i came to know that which test cases i failes?

#2

Please share the link of Code

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#3

try to run ur code on this test case
2 3
1 2 3
4 5 6

#4

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