/in/foo.cc: In function 'int main()':
/in/foo.cc:51:6: warning: overflow in implicit constant conversion [-Woverflow]
  ans=9999999999;
      ^~~~~~~~~~
/in/foo.cc: In function 'bool check(int)':
/in/foo.cc:35:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^