/in/foo.cc: In function 'int main()':
/in/foo.cc:5:20: warning: unused variable 'maxb' [-Wunused-variable]
  int a,b,max,maxab,maxb,s=0,minab,d;
                    ^~~~
/in/foo.cc:33:8: warning: 'max' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<max<<endl;
        ^~~
/in/foo.cc:26:19: warning: 'minab' may be used uninitialized in this function [-Wmaybe-uninitialized]
   if(((1+s)*maxab)%minab==0)
      ~~~~~~~~~~~~~^~~~~~
/in/foo.cc:5:14: warning: 'maxab' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int a,b,max,maxab,maxb,s=0,minab,d;
              ^~~~~