Compilare: main.cpp: In function 'int main()': main.cpp:31:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for (int i = 0; i < v[nod].size(); i ++){ | ~~^~~~~~~~~~~~~~~ main.cpp:45:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for(int j = 0; j < niv[i].size(); j ++){ | ~~^~~~~~~~~~~~~~~