/in/foo.cc: In function 'void solve()':
/in/foo.cc:156:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  156 |                 for(int j=0;j<scc[i].size();j++)
      |                             ~^~~~~~~~~~~~~~
/in/foo.cc:159:46: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  159 |                                 for(int k=0;k<g[x].size();k++)
      |                                             ~^~~~~~~~~~~~
/in/foo.cc:174:46: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  174 |                                 for(int i=0;i<scc[k].size();i++)
      |                                             ~^~~~~~~~~~~~~~