/in/foo.cc: In function 'int findMaxxiabiao(std::vector<int>&)':
/in/foo.cc:8:18: 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> findMax(std::vector<int>&)':
/in/foo.cc:24:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0;i < v.size();i++)
                ~~^~~~~~~~~~
/in/foo.cc:32:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0;i < v.size();i++)
                ~~^~~~~~~~~~
/in/foo.cc:23:6: warning: variable 'temp' set but not used [-Wunused-but-set-variable]
  int temp = -1;
      ^~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:62:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int k = 0;k < max.size();k++)
                 ~~^~~~~~~~~~~~