When I am introducing spaces using cout<<arr[i]<<" " in the last for loop, the output screen expected changes to “Nothing”. Its been happening every time there is a space included in output screens.
Your output has to exactly match what the server expects - you are sending too much data (it was expecting the end of your output but you kept sending data).
The change you describe would output "2 4 5 7 9 " and it expects “2 4 5 7 9”. The server is happy with your output until it finds an extra space at the end.
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