Wrong Answer
/in/foo.cc: In function 'void prind()':
/in/foo.cc:31:10: warning: 'i' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for(int i;i<=n;i++)
          ^
  /in/foo.cc: In function 'void prind()':
/in/foo.cc:31:10: warning: 'i' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for(int i;i<=n;i++)
          ^