foo.cc: In function 'int main()':
foo.cc:9:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<s[1].size();++i){
              ~^~~~~~~~~~~~
foo.cc:14:7: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(k<=(s[1].size())/2)putchar('0');
      ~^~~~~~~~~~~~~~~~~

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

正在同步测试数据，请稍后
{"receive":"2020-07-10T05:58:20.746Z","handle":"2020-07-10T05:58:20.746Z","cache_start":"2020-07-10T05:58:20.754Z","read_cases":"2020-07-10T05:58:23.460Z","judge":"2020-07-10T05:58:23.461Z","done":"2020-07-10T05:58:23.973Z"}