foo.cc: In function 'int main()':
foo.cc:26:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for (int i=0;i<n;i++)
     ^~~
foo.cc:28:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  int max=LongSub(a,n);
  ^~~

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