You have one loop to do the counting (as you are now).
You have another loop following to print all those seen[i] values which are non-zero.
You have one loop to do the counting (as you are now).
You have another loop following to print all those seen[i] values which are non-zero.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
