foo.cc: In function 'int main()':
foo.cc:10:6: warning: unused variable 'i' [-Wunused-variable]
  int i,j,a,b,ansa,ansb,l;
      ^
foo.cc:10:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j,a,b,ansa,ansb,l;
        ^
foo.cc:11:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d",&a,&b,&l);
  ~~~~~^~~~~~~~~~~~~~~~~~~

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":"2020-07-28T08:21:13.638Z","handle":"2020-07-28T08:21:13.638Z","cache_start":"2020-07-28T08:21:13.645Z","read_cases":"2020-07-28T08:21:14.074Z","judge":"2020-07-28T08:21:14.074Z","done":"2020-07-28T08:21:14.205Z"}