foo.cc: In function 'int main()':
foo.cc:12:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   cin >> a + 1;  // 输入序列
            ^
foo.cc:13:11: warning: format not a string literal and no format arguments [-Wformat-security]
   printf(a);
           ^

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

{"receive":"2020-03-24T13:09:50.136Z","handle":"2020-03-24T13:09:50.136Z","cache_start":"2020-03-24T13:09:50.143Z","read_cases":"2020-03-24T13:09:50.252Z","judge":"2020-03-24T13:09:50.253Z","done":"2020-03-24T13:09:51.610Z"}