foo.cc: In function 'int main()':
foo.cc:132:10: warning: unused variable 'k' [-Wunused-variable]
  int i,j,k,l,n;
          ^
foo.cc:132:12: warning: unused variable 'l' [-Wunused-variable]
  int i,j,k,l,n;
            ^
foo.cc:132:14: warning: unused variable 'n' [-Wunused-variable]
  int i,j,k,l,n;
              ^

自豪的采用jd5进行评测(github.com/masnn/jd5)

{"receive":"2020-02-14T03:11:39.448Z","handle":"2020-02-14T03:11:39.448Z","cache_start":"2020-02-14T03:11:39.449Z","read_cases":"2020-02-14T03:11:39.625Z","judge":"2020-02-14T03:11:39.626Z","done":"2020-02-14T03:11:53.065Z"}