/in/foo.cc: In function 'int main()':
/in/foo.cc:12:28: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
  for (int i=1;i<=n;i++) if (a[i]!=m) if (flag) printf(" %d",a[i]);else flag=1,printf("%d",a[i]);
                            ^