/in/foo.cc: In function 'void work_1(int)':
/in/foo.cc:31:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |     for (int i=0;i<s[now].size();i++)
      |                  ~^~~~~~~~~~~~~~
/in/foo.cc: In function 'void work_2(int)':
/in/foo.cc:63:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |     for (int i=0;i<s[now].size();i++)
      |                  ~^~~~~~~~~~~~~~