foo.cc: In function 'int main()':
foo.cc:14:23: warning: operation on 'a' may be undefined [-Wsequence-point]
  if(abs(a-b)<abs(int(a/=1.2)-b))
                      ~^~~~~
foo.cc:15:4: warning: operation on 'a' may be undefined [-Wsequence-point]
   a=int(a/=1.2),cnt--;
   ~^~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务