Compilare: main.cpp: In function 'int main()': main.cpp:54:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Arc>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for (i = 0; i < g[start].size(); ++i) | ~~^~~~~~~~~~~~~~~~~ main.cpp:65:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Arc>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | for (j = 0; j < g[vfmin].size(); ++j) | ~~^~~~~~~~~~~~~~~~~