Compilare: main.cpp: In function 'int main()': main.cpp:42:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for (i=0; i<v[nod].size (); i++) | ~^~~~~~~~~~~~~~~ main.cpp:63:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | for (i=0; i<v[nod].size (); i++) | ~^~~~~~~~~~~~~~~ main.cpp:84:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 84 | for (i=0; i<v[nod].size (); i++) | ~^~~~~~~~~~~~~~~