foo.cc: In function 'int Convert(char*, int*)':
foo.cc:8:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0;i<strlen(s);i++)
               ~^~~~~~~~~~
foo.cc:11:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0;i<strlen(s)-cnt;i++)
               ~^~~~~~~~~~~~~~
foo.cc:7:6: warning: unused variable 'isZero' [-Wunused-variable]
  int isZero=1, cnt=0;
      ^~~~~~

自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。