This is an example of a one character wonder. That's a program which is absolutely correct except for one misplaced character.
#include <stdio.h>
int main()
{
printf("Hello World/n");
return (0);
}
Hint 1: What you see is what you get.
Hint 2: What you see is what you get -- literally.
Hint 3: If you see 13 characters between then double quotes, then 13 characters are printed.