/in/foo.cc: In function 'int main()':
/in/foo.cc:43:10: warning: iteration 1004 invokes undefined behavior [-Waggressive-loop-optimizations]
  if (t1[i]) cout<<i<<" ";
      ~~~~^
/in/foo.cc:42:16: note: within this loop
  for (int i=1;i<=1005;i++)
               ~^~~~~~
/in/foo.cc:40:10: warning: iteration 1004 invokes undefined behavior [-Waggressive-loop-optimizations]
  if (t2[i]) cout<<i<<" ";
      ~~~~^
/in/foo.cc:39:16: note: within this loop
  for (int i=1;i<=1005;i++)
               ~^~~~~~
/in/foo.cc:37:7: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized]
   t2[p]++;
   ~~~~^
/in/foo.cc:24:13: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized]
         t1[p]++; 
         ~~~~^