Compilare: main.cpp: In function 'int main()': main.cpp:45:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for (int i = 0; i < v[nod].size(); i++){ | ~~^~~~~~~~~~~~~~~ main.cpp:73:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | for (int i = 0; i < prs.size(); i++){ | ~~^~~~~~~~~~~~ main.cpp:74:23: warning: variable 'pr' set but not used [-Wunused-but-set-variable] 74 | pair<int,int> pr = prs[i]; | ^~