foo.cc:12:12: warning: 'judgement' initialized and declared 'extern'
 extern int judgement=0;
            ^
foo.cc: In function 'bool isInteger(char*)':
foo.cc:83:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i=1;i<len;i++)
                      ^
foo.cc:88:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(k==len-1)
             ^
foo.cc:94:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i=0;i<len;i++)
                      ^
foo.cc:99:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(k==len)
             ^

自豪的采用 HydroJudger 进行评测(github.com/hydro-dev/HydroJudger)

{"receive":"2020-04-14T11:46:02.425Z","handle":"2020-04-14T11:46:02.425Z","done":"2020-04-14T11:46:03.645Z"}