foo.cc: In function 'int main()':
foo.cc:12:9: warning: unused variable 'a' [-Wunused-variable]
     int a,b,c;
         ^
foo.cc:12:11: warning: unused variable 'b' [-Wunused-variable]
     int a,b,c;
           ^
foo.cc:12:13: warning: unused variable 'c' [-Wunused-variable]
     int a,b,c;
             ^
foo.cc:11:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~

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":"2020-08-06T09:35:33.982Z","handle":"2020-08-06T09:35:33.982Z","cache_start":"2020-08-06T09:35:33.997Z","read_cases":"2020-08-06T09:35:34.574Z","judge":"2020-08-06T09:35:34.575Z","done":"2020-08-06T09:35:35.536Z"}