Compilare: main.cpp: In function 'int main()': main.cpp:27:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(int i=0; i<l[nod].size(); i++){ | ~^~~~~~~~~~~~~~ main.cpp:37:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for(int i=1; i<r.size()-1; i++){ | ~^~~~~~~~~~~