/in/foo.cc: In function 'void Prime()':
/in/foo.cc:19:18: warning: iteration 999999 invokes undefined behavior [-Waggressive-loop-optimizations]
   Rem[i]+=Rem[i-1];
                  ^
/in/foo.cc:3:33: note: within this loop
 #define Goo(i,a,n) for(int i=a;i<=n;i++)
                                  
/in/foo.cc:11:6:
  Goo(i,2,N)
      ~~~~~                       
/in/foo.cc:11:2: note: in expansion of macro 'Goo'
  Goo(i,2,N)
  ^~~