foo.cc: In function 'int main()':
foo.cc:27:17: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<aMaxNeg<<" "<<bMaxNeg<<endl;
                 ^~~
foo.cc:27:22: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<aMaxNeg<<" "<<bMaxNeg<<endl;
                      ^~~~~~~
foo.cc: In function 'int FindMaxNeg(int*, int)':
foo.cc:44:9: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return k;
         ^

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