Compilare: main.cpp: In function 'int main()': main.cpp:28:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for (int i = 0; i < roads[current].size(); i += 2) { | ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:30:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for (int j = 0; j < viz[current].size(); ++j) { | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:35:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for (int j = 0; j < viz[current].size(); ++j) { | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:43:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for (int i = 0; i < viz[n].size(); ++i) { | ~~^~~~~~~~~~~~~~~