foo.cc: In function 'int main()':
foo.cc:22:6: warning: unused variable 'x' [-Wunused-variable]
  int x,y,tot=0;
      ^
foo.cc:22:8: warning: unused variable 'y' [-Wunused-variable]
  int x,y,tot=0;
        ^
foo.cc:23:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d",&n,&m,&t);
  ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:25:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lf%lf",ax+i,ay+i);
   ~~~~~^~~~~~~~~~~~~~~~~~~~
foo.cc:27:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lf%lf%lf",rx+i,ry+i,v+i);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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