/in/foo.cc: In function 'int main()':
/in/foo.cc:24:22: warning: iteration 20018 invokes undefined behavior [-Waggressive-loop-optimizations]
   24 |                 s[i+1]+=s[i]/10;
      |                 ~~~~~^
/in/foo.cc:23:23: note: within this loop
   23 |         for(int i=1; i<=NUM*2; i++){
      |                      ~^~~~~~~