/in/foo.cc: In function 'int main()':
/in/foo.cc:19:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<strlen(d);i++){
              ~^~~~~~~~~~
/in/foo.cc:30:13: warning: unused variable 'las' [-Wunused-variable]
   int cur=0,las=0,now=0;
             ^~~
/in/foo.cc:30:19: warning: unused variable 'now' [-Wunused-variable]
   int cur=0,las=0,now=0;
                   ^~~