foo.cc: In function 'void bfs()':
foo.cc:43:21: warning: unused variable 'nx' [-Wunused-variable]
     int wx,wy,tx,ty,nx,ny; //wx,wy是p2的，tx,ty是p1的，nx,ny是现在的 
                     ^~
foo.cc:43:24: warning: unused variable 'ny' [-Wunused-variable]
     int wx,wy,tx,ty,nx,ny; //wx,wy是p2的，tx,ty是p1的，nx,ny是现在的 
                        ^~

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

{"receive":"2020-05-23T09:10:37.762Z","handle":"2020-05-23T09:10:37.762Z","cache_start":"2020-05-23T09:10:37.768Z","read_cases":"2020-05-23T09:10:37.883Z","judge":"2020-05-23T09:10:37.883Z","done":"2020-05-23T09:10:38.433Z"}