Test case failed

how should i know about specifically which test case i failed?

Please share your code

#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]<<", β€œ; i++; } j++; i–; while(i>=0) { cout<<arr[i][j]<<”, "; i–; } j++; i++; } cout<<β€œEND”; return 0; }

hey please provide on this https://ide.codingblocks.com/
go here ,paste your code ,Press ctrl+S & share the url link

No need now ,I checked your code
It will fail when columns are odd because in each iteration of outer loop you are printing 2 columns .
So to avoid that add a break statement between inner while loops
This one if(j==N)break;

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