In file included from /in/driver/main.cpp:1:0:
/in/shortestP2P.hpp: In member function 'void ShortestP2P::readGraph()':
/in/shortestP2P.hpp:66:24: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
     for (auto i = 0; i < num_nodes; i++) {
                      ~~^~~~~~~~~~~
/in/shortestP2P.hpp:69:24: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
     for (auto i = 0; i < num_edges; i++) {
                      ~~^~~~~~~~~~~
/in/shortestP2P.hpp:75:23: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
     for (int k = 0; k < num_nodes; k++) {
                     ~~^~~~~~~~~~~
/in/shortestP2P.hpp:76:27: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
         for (int i = 0; i < num_nodes; i++) {
                         ~~^~~~~~~~~~~
/in/shortestP2P.hpp:77:31: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
             for (int j = 0; j < num_nodes; j++) {
                             ~~^~~~~~~~~~~
cc1plus: all warnings being treated as errors