foo.cc: In function 'void dijkstra()':
foo.cc:20:6: warning: unused variable 'val' [-Wunused-variable]
  int val,ke;
      ^~~

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

{"receive":"2020-08-10T03:30:28.760Z","handle":"2020-08-10T03:30:28.760Z","cache_start":"2020-08-10T03:30:28.768Z","read_cases":"2020-08-10T03:30:29.098Z","judge":"2020-08-10T03:30:29.099Z","done":"2020-08-10T03:30:30.210Z"}