Compilare: main.cpp: In function 'void Read()': main.cpp:34:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[1].size(); ++i) ~~^~~~~~~~~~~~~ main.cpp: In function 'void Solve()': main.cpp:72:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < G[X.second].size(); ++j) ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:76:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < aux.size(); ++i) ~~^~~~~~~~~~~~