/in/foo.cc: In function 'std::vector<int> solve(std::vector<int>, int, int)':
/in/foo.cc:61:6: warning: unused variable 'tmp' [-Wunused-variable]
  int tmp;
      ^~~
/in/foo.cc: In function 'void printVec(std::vector<int>&)':
/in/foo.cc:96:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < v.size(); i++)
                  ~~^~~~~~~~~~
/in/foo.cc: In function 'std::vector<int> greatForceSolve(std::vector<int>, int, int)':
/in/foo.cc:104:6: warning: unused variable 'tmp' [-Wunused-variable]
  int tmp;
      ^~~