foo.cc: In function 'int main()':
foo.cc:55:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^
foo.cc:58:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   eve[st].pb(pii(tim,len));
                           ^
foo.cc:58:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
foo.cc:79:13: warning: 'pos' may be used uninitialized in this function [-Wmaybe-uninitialized]
  prtime(pos);
             ^

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

{"receive":"2020-04-02T13:05:54.433Z","handle":"2020-04-02T13:05:54.433Z","cache_start":"2020-04-02T13:05:54.440Z","read_cases":"2020-04-02T13:05:55.019Z","judge":"2020-04-02T13:05:55.020Z","done":"2020-04-02T13:05:57.642Z"}