foo.c:1:1: error: expected identifier or '(' before '...' token
 ..........................*/
 ^~~
foo.c:3:10: fatal error: algorithm: No such file or directory
 #include <algorithm>
          ^~~~~~~~~~~
compilation terminated.

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