foo.c: In function 'main':
foo.c:5:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&L,&M);
  ^~~~~~~~~~~~~~~~~~~
foo.c:9:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&initial,&end);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~

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

{"receive":"2020-08-06T03:06:44.908Z","handle":"2020-08-06T03:06:44.908Z","cache_start":"2020-08-06T03:06:44.915Z","read_cases":"2020-08-06T03:06:45.040Z","judge":"2020-08-06T03:06:45.040Z","done":"2020-08-06T03:06:45.329Z"}