/in/foo.c: In function 'main':
/in/foo.c:11:7: warning: iteration 29 invokes undefined behavior [-Waggressive-loop-optimizations]
   a[i]=a[i-1]+a[i-2];
   ~~~~^~~~~~~~~~~~~~
/in/foo.c:9:2: note: within this loop
  for(i=3;i<=32;i++)
  ^~~