Compilare: main.cpp: In function 'int main()': main.cpp:31:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[1].size(); i++) ~~^~~~~~~~~~~~~ main.cpp:50:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < G[t.second.second].size(); j++) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:62:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sol.size(); i++) ~~^~~~~~~~~~~~