foo.cc: In function 'int main()':
foo.cc:20:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&k);
     ~~~~~^~~~~~~~~~~~~~
foo.cc:23:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s",s+1);
         ~~~~~^~~~~~~~~~

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

{"receive":"2020-05-29T12:05:10.144Z","handle":"2020-05-29T12:05:10.160Z","cache_start":"2020-05-29T12:05:10.243Z","read_cases":"2020-05-29T12:05:11.119Z","judge":"2020-05-29T12:05:11.122Z","done":"2020-05-29T12:05:12.078Z"}