Compilare: user.cpp: In function ‘bool back(int, int, int, int)’: user.cpp:161:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (cntNodes == cbc[numComponent].size()) ^ user.cpp: In function ‘bool solve()’: user.cpp:178:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < biconOrder.size(); ++i) { ^ user.cpp:181:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] int finish = ((i + 1) != biconOrder.size()) ? critical[i + 1] : -1; ^ user.cpp:187:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i != biconOrder.size() - 1) ^ user.cpp: In function ‘int findComponent(int)’: user.cpp:107:1: warning: control reaches end of non-void function [-Wreturn-type] } ^