Compilare: user.cpp: In function ‘void decreaseDegree(int)’: user.cpp:20:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[y].size(); ++i) ^ user.cpp: In function ‘void BFS()’: user.cpp:50:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[x].size(); ++i) ^ user.cpp: In function ‘void printSol()’: user.cpp:75:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[0].size(); ++i) ^