Compilare: main.cpp: In function 'void bfs(std::vector<int>)': main.cpp:71:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < liste[top].size(); i++) ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:134:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < liste[el].size(); j++) ~~^~~~~~~~~~~~~~~~~~ main.cpp:118:6: warning: unused variable 'nM' [-Wunused-variable] int nM = sortate[1].nivel; ^~